TOYODA Shin

J-GLOBAL         Last updated: Mar 22, 2019 at 13:49
 
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Name
TOYODA Shin
Affiliation
Okayama University of Science
Section
Faculty of Science, Department of Applied Physics
Job title
Professor
Degree
(BLANK)(Osaka University), (BLANK)(The University of Tokyo)
Research funding number
40207650

Research Areas

 

Academic & Professional Experience

 
1988
 - 
1998
Research Associate, Osaka University
 
1994
 - 
1996
Canada International Fellow
 
1997
   
 
Fellow, Centre de Nationale Recherche
 
 
   
 
Scientifique, France
 
2004
   
 
Visiting Professor, Muséum National d'Histoire
 

Education

 
 
 - 
1988
Graduate School, Division of Science, The University of Tokyo
 
 
 - 
1985
Faculty of Science, The University of Tokyo
 

Published Papers

 
A. Harshman, S. Toyoda, T. Johnson
Rad. Meas.   116 46-50   Sep 2018   [Refereed]
Report of the Okayama University of Science – Mongolian Institute of Paleontology and Geology Joint Expedition in 2017
S. Ishigaki, K. Tsogtbaatar, H. Nishido, S. Toyoda, B. Mainbayar, T. Chinzorig, Y. Noumi, A. Takahashi, S. Ulziitseren, E. Zorig, B. Buyantegsh, B. Purevsuren, G. Enerel, C. Bayardorj, E. Ochirjantsan, M. Saneyoshi, K. Aoki, S. Hayashi
Bull. Res. Inst. Nat. Sci., Okayama Univ. of Sci.   43 25-39   2018   [Refereed]
S. Nakai, A. Takamasa, T. Fujiwara, S. Toyoda, J. Ishibashi, R. Yoshizumi, T. Urabe
Chemical Geology   (486) 61-72   May 2018   [Refereed]
Strontium concentration dependence of the k value in barite
K. kyogoku, S. Toyoda, T. Fujiwara, H. Nishido
Advances in ESR Applications   34 4-7   2018   [Refereed]
M. Murahashi, S. Toyoda, M. Hoshi, M. Ohtaki, S. Endo, K. Tanaka, Y. Yamada
Rad. Meas.   106 450-454   Nov 2017   [Refereed]
The sensitivities to dose of the radiation induced signal observed in tooth enamel were examined by electron spin resonance (ESR) for individual deciduous and permanent teeth. The sensitivities in deciduous teeth are in agreement with those in per...
K. Zhumadilov, A. Ivannikov, A. Khailov, S. Orlenko, V. Skvortsov, V. Stepanenko, K. Kuterbekov, S. Toyoda, P. Kazymbet, M. Hoshi
E3S Web of Conferences   22(00201)    Nov 2017   [Refereed]
In order to estimate radiation effects on uranium enterprise staff and population teeth samples were collected for EPR tooth enamel dosimetry from population of Stepnogorsk city and staff of uranium mining enterprise in Shantobe settlment (Akmola ...
V. Stepanenko, T. Rakhypbekov, K. Otani, S. Endo, K. Satoh, N. Kawano, K. Shichijo, M. Nakashima, T. Takatsuji. A. Sakaguchi, H. Kato, Y. Onda, N. Fujimoto, S. Toyoda, H. Sato, A. Dyussupov, N. Chaizhunusova, N. Sayakenov, D. Uzbekov, A. Saimova, D. Shabdarbaeva, M. Skakov, A. Vurim, V. Gnyrya, A. Azimkhanov, A. Kolbayenkov, K. Zhumadilov, Y. Kairikhanova, A. Kaprin, V. Galkin, S. Ivanov, T. Kolyzhenkov, A. Petukhov, E. Yaskova, I. Belukha, A. Khailov, V. Skvortsov, A. Ivannikov, U. Akhmedova, V. Bogacheva, M. Hoshi
Radiation and Environmental Biophysics   56(1) 47-54   Mar 2017   [Refereed]
There were two sources of ionizing irradiation after the atomic bombings of Hiroshima and Nagasaki: (1) initial gamma-neutron irradiation at the moment of detonation and (2) residual radioactivity. Residual radioactivity consisted of two component...
Thermal stability of ESR signals in hydrothermal anhydrite
T. Fujiwara, S. Toyoda, A. Uchida, J. Ishibashi
Advances in ESR Applications   33 9-13   Mar 2017   [Refereed]
T. Chuenpee, O. Nishikawa, Y. Kon, K. Ninagawa, S. Toyoda, T. Ogata, T. Uchida, I. Takashima
Applied Radiation and Isotopes   120 30-39   Feb 2017   [Refereed]
This study analyzes the Thermoluminescence (TL) emissions for five emission bands, trace element concentrations and defects in quartz grains extracted from metamorphic rocks and quartz veins in the Sambagawa metamorphic belt, central Shikoku. An e...
Curriculum improvements in the basic science education programs made by the Science Education Center at Okayama University of Science
(1) 164-174   2017   [Refereed]
S. Toyoda, T. Fujiwara, A. Uchida, J. Ishibashi
Geochronometria   43 201-206   Dec 2016   [Refereed]
Electron spin resonance (ESR) dating of barite has been recently developed and is now practically applied to barite extracted from sea-floor hydrothermal deposits. The evolution of the accumulated dose to barite is simulated for an actual sample o...
A. Shimada, M. Takada, S. Toyoda
Geochronometria   43 155-161   Dec 2016   [Refereed]
In this study, measurements of electron spin resonance (ESR) signals from quartz grains from present-day river bed sediments of the Kizu River basin (western Japan) were used to estimate the mixing ratios of the possible source materials of these ...
T. Fujiwara, S. Toyoda, A. Uchida, H. Nishido, J. Ishibashi
Geochronometria   43 174-178   Dec 2016   [Refereed]
The alpha effectiveness value (k-value) for the ESR (Electron Spin Resonance) signal due to SO3- in barite was revised by comparing the dose responses of the signal intensities to gamma rays and to 4 MeV He+ ion doses in natural sea-floor hydrothe...
Mongolian institute of paleontology and geology joint expedition in 2016
S. Ishigaki, Kh. Tsogtbaatar, M. Saneyoshi, B. Mainbayar, K. Aoki, S. Ulziitseren, T. Imayama, A. Takahashi, S. Toyoda, Ch. Bayardorj, B. Buyantegsh, J. Batsukh, B. Purevsuren, H. Asai, S. Tsutanaga, K. Fujii
Bull. Natural Research Center of Okayama University of Science   42 33-46   Dec 2016
V.F. Stepanenko, T.K. Rakhypbekov, A.D. Kaprin, S.A. Ivanov, K. Otani, S. Endo, K. Satoh, N. Kawano, T. Takatsuji, M. Nakashima, K. Shichijo, A. Sakaguchi, H. Kato, Y. Onda, N. Fujimoto, S. Toyoda, H. Sato, T.V. Kolyzhenkov, A.D. Petukhov, A.A. Dyussupov, N.Zh. Chaizhunusova, N.B. Sayakenov, D.E. Uzbekov, A.Zh. Saimova, D.M. Shabdarbaeva, L.N. Pivina, M.K. Skakov, A.D. Vurim, V.S. Gnyrya, A.C. Azimkhanov, A.N. Kolbayenkov, K.Sh. Zhumadilov, Y.O. Kairkhanova, E.K. Yaskova, I.G. Belukha, V.G. Skvortsov, A.I. Ivannikov, A.M. Khailov, U.A. Akhmedova, V.V. Bogacheva, Yu.N. Anokhin, S.P. Orlenko, M. Hoshi
Risk of Radiation(in Russian)   25(4) 111-125   2016   [Refereed]
The radionuclide 56Mn (T1/2=2.58 hours) is one of the dominant beta- and gamma-emitters within few
hours after the neutron irradiation of soil dust following nuclear explosion in atmosphere. The effects
of exposure to residual radioactivity from n...
K. Zhumadilov, A. Ivannikov, V. Stepanenko, S. Toyoda,V. Skvortsov, M. Hoshi
Radiation protection dosimetry   172(1-3) 260-264   Dec 2016   [Refereed]
The method of electron paramagnetic resonance (EPR) dosimetry using extracted teeth has been applied to human tooth enamel to obtain individual absorbed doses of residents of settlements in the vicinity of the central axis of radioactive fallout t...
V. Kumar, A. K. Srivastava, S. Toyoda, I. Kaur
Fullerenes Nanotubes and Carbon Nanotubes   24(3) 190-194   Mar 2016   [Refereed]
Being innocuous, nanodiamonds find huge applications in bioimaging, drug delivery and biomedical sensing. Their synthesis is generally carried out by detonation or shock wave methods. This article reports novel, economical and risk-free extraction...
S. Toyoda, Y. Yamamoto and Y. Igarashi
JAEA Takasaki Annual report 2014   (JAEA-Review 2015-022,) 162   Feb 2016
Cathodoluminescence of feldspar minerals and radiation effects on the luminescent properties
H. Nisihido, M. Kayama, S. Toyoda, K. Komuro
JAEA Takasaki Annual report 2014   (JAEA-Review 2015-022) 164   Feb 2016
S. Toyoda, K. Nagashima, Y. Yamamoto
Quaternary International   397 258-266   Mar 2016   [Refereed]
The oxygen vacancies in quartz, measured by electron spin resonance (ESR) as the E1' center, and crystallinity index (CI) of quartz by X-ray diffraction have been found to be useful tracers for provenance of sediments. This paper will review the p...
M. Yoshida, S. Toyoda, K. Ninagawa, M. Takada, A. Shimada
Advances in ESR Applications   32 4-10   Mar 2016   [Refereed]
The variations in the number of oxygen vacancies and in the thermoluminescence (TL) colors in quartz of the sediments are investigated along with the Kurobe river together with those in the bedrocks in the river reaches by electron spin resonance ...
ESR dating of volcanic quartz with impurity centers : comparison of regeneration protocols and dose recovery tests
M. Asagoe, S. Toyoda
Advances in ESR Applications   32 11-18   Mar 2016   [Refereed]
The protocol and the signals to be used are the important issues in the ESR dating of tephra using quartz. Three protocols, additive dose, regenerative, and regenerative-additive dose methods are used in the present study to date two tephra sample...
S. Toyoda
Quaternary Geochronology   30 498-505   Oct 2015   [Refereed]
Quartz is one of the minerals useful for ESR dating with many applications. Although the study has quite a long history since 1980's, ESR dating of quartz is still in a developing stage. After the basis in physics for the ESR signals in quartz is ...
R. H. Biswas, S. Toyoda, M. Takada, Y. Shitaoka
Quaternary Geochronology   30 350-356   Oct 2015   [Refereed]
The present study aimed to test reliability of luminescence and electron spin resonance (ESR) methods to date tephra. We investigated on three Japanese marker tephras, Ikeda-ko (6.4 ka), Aira-Tn (30 ka) and Aira-Iwato (45-50 ka). A systematic stud...
P. Voinchet, S. Toyoda, C. Fagueres, M. Hernandez, H. Tissoux, D. Moreno, J.-J. Bahain
Quaternary Geochronology   30 506-512   Oct 2015   [Refereed]
Luminescence and ESR dating methods of quartz sediment are based on the natural resetting of the signal by light exposure (optical bleaching). When the bleaching is incomplete, a residual dose (DeR) is added to the post-depositional dose accumulat...
H. Kumagai, H. Watanabe, T. Yahagi, S. Kojima, S. Nakai, S. Toyoda, J. Ishibashi in J. Ishibashi, K. Okino, M. Sunamura, eds.
Subseafloor Biosphere Linked to Global Hydrothermal Systems; TAIGA Concept, Springer, Tokyo   5 49-59   Jan 2015   [Refereed]
To elucidate the evolution of hydrothermal activities, we conducted an interdisciplinary study including geochemistry and biology to develop a method of obtaining reliable age information. As geochemical dating techniques, two methods applicable f...
J. Ishibashi, K. Shimada, F. Sato, A. Uchida, S. Toyoda, A. Takamasa, S. Nakai, H. Hyodo, K. Sato, H. Kumagai, K. Ikehata in J. Ishibashi, K. Okino, M. Sunamura, eds.
Subseafloor Biosphere Linked to Global Hydrothermal Systems; TAIGA Concept, Springer, Tokyo   23 289-300   Jan 2015   [Refereed]
Ages of sulfide and sulfate mineralized samples collected from active hydrothermal fields in the Southern Mariana Trough were determined. In addition to samples collected from active and inactive chimneys, and sulfide breccia during dive expeditio...
T. Fujiwara, S. Toyoda, A. Uchida, J. Ishibashi, S. Nakai, A. Takamasa, in J. Ishibashi, K. Okino, M. Sunamura, eds.
Subseafloor Biosphere Linked to Global Hydrothermal Systems; TAIGA Concept, Springer, Tokyo   29 369-386   Jan 2015   [Refereed]
ESR (electron spin resonance) ages were determined for barite crystals extracted from hydrothermal sulfide deposits taken at Daiyon-Yonaguni Knoll field, Hatoma Knoll field, Iheya North Knoll field, Hakurei Site of Izena Hole field, Yoron Hole fie...
T. Yamanaka, H. Nagashio, R. Nishio, K. Kondo, T. Noguchi, T. Noguchi, K. Okamura, T. Nunoura, H. Makita, K. Nakamura, H. Watanabe, K. Inoue, T. Toki, K. Iguchi, U. Tsunogai, R. Nakada, S. Ohshima, S. Toyoda, J. Kawai, N. Yoshida, A. Ijiri, M. Sunamura in J. Ishibashi, K. Okino, M. Sunamura, eds
Subseafloor Biosphere Linked to Global Hydrothermal Systems; TAIGA Concept, Springer, Tokyo   40 497-504   Jan 2015   [Refereed]
Tarama Knoll is located about 60 km north of Tarama Island, Sakishima Islands, southwestern Japan. The knoll has an almost conical shape, with foot and summit depths of 2,000 and 1,490 m (total relief ? 510 m) from the sea surface, respectively. T...
K. Nakamura, H. Sato, P. Fryer, T. Urabe in J. Ishibashi, K. Okino, M. Sunamura, eds.
Subseafloor Biosphere Linked to Global Hydrothermal Systems; TAIGA Concept, Springer, Tokyo   41 507-533   Jan 2015   [Refereed]
Petrographic and geochemical characteristics of drill core and surface rock samples from the four hydrothermal vent sites of the Yamanaka, Snail, Archaean, and Pika sites at the Southern Mariana Trough (SMT) are described in order to clarify the g...
S. Toyoda, D. Banerjee, H. Kumagai, J. Miyazaki, J. Ishibashi, N. Mochizuki, S. Kojima in J. Ishibashi, K. Okino, M. Sunamura, eds.
Subseafloor Biosphere Linked to Global Hydrothermal Systems; TAIGA Concept, Springer, Tokyo   46 603-606   Jan 2015   [Refereed]
The dose rates in sea water in the Southern Mariana Trough sea floor hydrothermal area were investigated. The dose rate in sea water was less than detection limit (about 0.1 mGy/year) near the sea surface while it was around 2 mGy/year at the sea ...
A. Uchida, S. Toyoda, J. Ishibashi, S. Nakai in J. Ishibashi, K. Okino, M. Sunamura, eds.
Subseafloor Biosphere Linked to Global Hydrothermal Systems; TAIGA Concept, Springer, Tokyo   47 607-615   Jan 2015   [Refereed]
The226Ra-210Pb and228Ra-228Th ages were obtained for barite crystals in hydrothermal sulfide deposits taken at the Okinawa Trough and the Southern Mariana Trough. After calibrating the measurement systems with standard samples with pitchblende, it...
V. Varma, S. Toyoda, Y. Isono, A. Uchida, D. Banerjee, A. K. Singhvi, J. Ishibashi in J. Ishibashi, K. Okino, M. Sunamura, eds.
Subseafloor Biosphere Linked to Global Hydrothermal Systems; TAIGA Concept, Springer, Tokyo   48 617-620   Jan 2015   [Refereed]
In estimating the ages of sea floor hydrothermal deposits, the age of the sediments overlying it would give the youngest limit if the sedimentation age is correct. The OSL (optically stimulated luminescence) method was applied to two sediment core...
S. Toyoda, F. Sato, A. Uchida, J. Ishibashi in J. Ishibashi, K. Okino, M. Sunamura, eds.
Subseafloor Biosphere Linked to Global Hydrothermal Systems; TAIGA Concept, Springer, Tokyo   49 621-624   Jan 2015   [Refereed]
The radiation from the sulfide deposits taken at Okinawa Trough was measured on-board by a NaI gamma ray spectrometer immediately after the retrieval of the sample onto the research vessel. Gamma ray peaks were identified as those from daughter nu...
S. Tsukamoto, S. Toyoda, A. Tani, F. Oppermann
Radiation Measurements   81 9-15   Oct 2015   [Refereed]
Equivalent dose (De) estimations in electron spin resonance (ESR) dating have mostly been done by the multiple aliquot additive dose (MAAD) method despite disadvantages. In this study, we used X-ray irradiations and applied the single aliquot rege...
S. Toyoda, T. Fujiwara, A. Uchida, J. Ishibashi, S. Nakai, A. Takamasa
Radiation Protection Dosimetry   159(1-4) 203-211   Jun 2014   [Refereed]
Barite is a mineral newly found to be practically useful for electron spin resonance (ESR) dating of sulphide deposits formed by the sea-floor hydrothermal activities. The recent studies for the properties of the ESR dating signal in barite are su...
Y. Nosohara, S. Toyoda, M. Takada, A. Shimada, M. Yoshida
Advances in ESR Applications   30 4-11   Feb 2014   [Refereed]
A. Uchida, S. Toyoda, H. Tissoux, C. Falguères, K. Ninagawa, D. Miallier
Advances in ESR Applications   30 12-15   Feb 2014   [Refereed]
M. Kayama, H. Nishido, S. Toyoda, K. Komuro, A. A. Finch, M. R. Lee, K. Ninagawa
American Mineralogist   99(1) 65-75   Jan 2014   [Refereed]
Cathodoluminescence (CL) spectroscopy provides useful information about the existence of radiation-induced defect centers with a few micrometer resolutions and therefore has great potential to estimate the accumulated dose of natural radiation in ...
Y. Sun, H. Chen, R. Tada, D. Weiss, M. Lin, S. Toyoda, Y. Yan, Y. Isozaki
Geochemistry, Geophysics, Geosystems   14(8) 2615-2627   Aug 2013   [Refereed]
Electron spin resonance (ESR) signal intensity and crystallinity index (CI) of fine- (<16 μm) and coarse-grained (>16 μm) quartz were measured in surface samples from the Taklimakan desert in western China, the Badain Juran, Tengger and Mu Us dese...
K. Nagashima, R. Tada, S. Toyoda
Geochemistry, Geophysics, Geosystems   14(12) 5041-5053   Dec 2013   [Refereed]
The causes of spatial and temporal changes in East Asian summer monsoon (EASM) precipitation on millennial to multimillennial time scales during the Holocene have not yet been resolved. Here, we examine the relationship between spatial variations ...
Y. Yamamoto, S. Toyoda, K. Nagashima, Y. Igarashi, R. Tada
Geochronometria   40(4) 355-359   Dec 2013   [Refereed]
The temporal change in the number of oxygen vacancies in quartz was investigated by ob-serving the E1' center in the atmospheric depositions collected at two cities in Japan in the recent past. The depositions collected at Fukuoka in March show th...
A. Shimada, M. Takada, S. Toyoda
Geochronometria   40(4) 334-340   Dec 2013   [Refereed]
The variation of electron spin resonance (ESR) signal intensities and thermoluminescence colour images (TLCIs) of quartz was investigated in the present study for various rocks and sediments in Japan, to discuss the possibilities of identifying th...
M. Kayama, H. Nishido, S. Toyoda, K. Komuro, A. A. Finch, M. R. Lee, K. Ninagawa
Geochronometria   40(4) 244-249   Dec 2013   [Refereed]
Cathodoluminescence (CL) of minerals such as quartz and zircon has been extensively studied to be used as an indicator for geodosimetry and geochronometry. There are, however, very few investigations on CL of other rock-forming minerals such as fe...
M. Kayama, H. Nishido, S. Toyoda, K. Komuro, A. A. Finch, M. R. Lee, K. Ninagawa
Physics and Chemistry of Minerals   40 531-545   Jul 2013   [Refereed]
Cathodoluminescence (CL) spectra of unirradiated, He+ ion-implanted and electron-irradiated plagioclase minerals contain the following emission bands: (1) below 300 nm due to Pb2+, (2) at ~320 and ~350 nm to Ce3+, (3) at 380-420 nm to Eu2+, Ti4+ a...
A. Takamasa, S. Nakai, F. Sato, S. Toyoda, D. Banerjee, J. Ishibashi
Quaternary Geochronology   15 38-46   Feb 2013   [Refereed]
A block of sulfide crust collected from an active hydrothermal mound in an Archaean site (12°56.4'N, 143°37.9'E; depth ca. 3000 m) of the South Mariana Trough was dated using both 230Th/234U disequilibrium and electron spin resonance (ESR) methods...
K. Zhumadilov, A. Ivannikov, V. Stepanenko, D. Zharlyganova, S. Toyoda, Z. Zhumadilov, M. Hoshi
Journal of Radiation Research   54(4) 775-779   Feb 2013   [Refereed]
A tooth enamel electron spin resonance (ESR) dosimetry study was carried out with the purpose of obtaining the individual absorbed radiation doses of population from settlements in the Semipalatinsk region of Kazakhstan, which was exposed to radio...
K. Nagashima, S. Toyoda
エアロゾル研究   27(3) 284-291   2012   [Refereed]
The eolian dust in the sediments of North Pacific and marginal seas of the northwestern Pacific has potential to record past climate changes. For example, the variability of eolian dust flux estimated from North Pacific sediments have been interpr...
S. Toyoda, F. Sato, H. Nishido, M. Kayama, J. Ishibashi
Radiation Measurements   47(9) 900-902   Sep 2012   [Refereed]
The alpha effectiveness was investigated for an ESR signal due to View the MathML sourceSO3− in barite by comparing the dose responses of the signal for gamma irradiation and for He ion implantation with an energy of 4 MeV. The value was obtained ...
H. Tissoux, P. Voinchet, F. Lacquement, F. Prognon, D. Moreno, C. Falguères, J.-J. Bahain, S. Toyoda
Radiation Measurements   47(9) 894-899   Sep 2012   [Refereed]
Electron Spin Resonance (ESR) can be used as a method to estimate the age of sediment deposition using the paramagnetic centre related to aluminium impurities in quartz. This so-called Al-centre can be partially optically bleached and its signal i...
K. Nagashima, Y. Asahara, F. Takeuchi, N. Harada, S. Toyoda, R. Tada
Deep-Sea Research Part II: Topical Studies in Oceanography   61-64 145-154   Feb 2012   [Refereed]
Bering Sea sediments contain detrital materials from the Yukon River. These materials may contain records of past climate changes in the Arctic area, such as the melting of glaciers around the drainage basin of the Yukon River, which help to under...
J. S. Tawale, H. Nishido, S. Toyoda, M. Deepa, N. Bahadur, M. Maniraj, S. R. Barman, B. R. Chakraborty, A. K. Srivastava
Advances in Nanodevices and Nanofabrication: Selected Publications from Symposium of Nanodevices and Nanofabrication in ICMAT2011   16 231-250   Jul 2012   [Refereed]
P. Fattibene, A. Wieser, E. Adolfsson, L. A. Benevides, M. Brai, F. Callens, V. Chumak, B. Ciesielski, S. Della Monaca, K. Emerich, H. Gustafsson, Y. Hirai, M. Hoshi, A. Israelsson, A. Ivannikov, D. Ivanov, J. Kaminska, W. Ke, E. Lund, M. Marrale, L. Martens, C. Miyazawa, N. Nakamura, W. Panzer, S. Pivovarov, R. A. Reyes, M. Rodzi, A. A. Romanyukha, A. Rukhin, S. Sholom, V. Skvortsov, V. Stepanenko, M. A. Tarpan, H. Thierens, S. Toyoda, F. Trompier, E. Verdi, K. Zhumadilov
Radiation Measurements   46 765-771   Sep 2011   [Refereed]
This paper presents the results of the 4th International Comparison of in vitro electron paramagnetic resonance dosimetry with tooth enamel, where the performance parameters of tooth enamel dosimetry methods were compared among sixteen laboratorie...
M. Kayama, H. Nishido, S. Toyoda, K. Komuro, K. Ninagawa
Spectroscopy Letters   44 526-529   Oct 2011   [Refereed]
Cathodoluminescence (CL) spectra of experimentally radiated albite at 4.0 MeV energy of He+ ion implantation have red emissions at 700-750 nm, of which the intensities increase with an increase in the radiation dose. These emissions are assigned t...
M. Asagoe, S. Toyoda, P. Voinchet, C. Falguères, H. Tissoux, T. Suzuki, D. Banerjee
Quaternary International   246 118-123   Dec 2011   [Refereed]
The multiple-aliquot regenerative-additive method of ESR (electron spin resonance) dating was applied to Numazawa-Shibahara (Nm-Sb) tephra from Fukushima, Japan, with dose recovery tests for impurity centers in quartz. The age obtained from Ti-H c...
K. Zhumadilov, A. Ivannikov, D. Zharlyganova, Zh. Zhumadilov, V. Stepanenko, Sh. Abralina, L. Sadvokasova, A. Zhumadilova, S. Toyoda, S. Endo, T. Okamoto, M. Hoshi
Radiation Measurements   46 793-796   Sep 2011   [Refereed]
The method of electron spin resonance (ESR) dosimetry has been applied to human tooth enamel in order to obtain individual absorbed doses from the population of settlements within the vicinity of the central axis of the radioactive fallout trace f...
S. Toyoda, A. Kondo, K. Zhumadilov, M. Hoshi, C. Miyazawa, A. Ivannikov
Radiation Measurements   46(9) 797-800   Sep 2011   [Refereed]
The background doses for the teeth of Japanese residents were obtained by electron spin resonance (ESR) method. The doses obtained from 77 of 92 samples are less than 100 mGy while the doses of the other samples are high up to 250 mGy. The doses f...
F. Sato, S. Toyoda, D. Banerjee, J. Ishibashi
Radiation Measurements   46(9) 866-870   Sep 2011   [Refereed]
Thermal stability of the ESR signals from barites in chimneys deposited from hydrothermal vents is investigated using isothermal and isochronal annealing experiments. A combination of first and second order kinetics is required to explain the resu...
K. Zhumadilov, A. Ivannikov, D. Zharlyganova, V. Stepanenko, Z. Zhumadilov, K. Apsalikov, S. Toyoda, S. Endo, K. Tanaka, C. Miyazawa, T. Okamoto, M. Hoshi
Radiation Measurements   46(4) 425-429   Apr 2011   [Refereed]
The method of electron spin resonance (ESR) dosimetry was applied to human tooth enamel to obtain estimates of individual absorbed dose for residents of Makanchi, Urdzhar and Taskesken settlements located near the Kazakhstan–Chinese border (about ...
M. Kayama, H. Nishido, S. Toyoda, K. Komuro, K. Ninagawa
American Mineralogist, Mineralogical Society of America   96(8-9) 1238-1247   Aug 2011   [Refereed]
He+ ion implantation on albite (Minas Gerais, Brazil) at 4.0 MeV, corresponding to the energy of α particle from 238U fission, has been conducted to clarify the radiation effects of α particles from radioactive minerals on cathodoluminescence (CL)...
K. Nagashima, R. Tada, A. Tani, Y. Sun, Y. Isozaki, S. Toyoda, H. Hasegawa
Journal of Asian Earth Sciences   40(6) 1214-1220   Apr 2011   [Refereed]
It has been established that East Asian summer monsoon intensity varies with Dansgaard–Oeschger cycles, suggesting a connection between the climates of East Asia and the North Atlantic on a millennial timescale. However, the dynamics of such a con...
D. Banerjee, S. Toyoda, M. Takada, A. Shimada
Advances in ESR Applications   27 7-10   Mar 2011   [Refereed]
S. Toyoda, F. Sato, D. Banerjee, J. Ishibashi
Advances in ESR applications   27 4-6   Mar 2011   [Refereed]
S. Toyoda
Geochronometria,   38(3) 242-248   Sep 2011   [Refereed]
Quartz is one of the minerals useful for electron spin resonance (ESR) dating. The E1′ center is one of well-known paramagnetic defects in crystalline quartz. This center has a unique feature; its intensity increases on heating. An electronic proc...
K. Nagashima, R. Tada, S. Toyoda
Proceedings of the Eleventh Workshop on Environmental Radioactivity   (2010-8) 10-18   Nov 2010   [Refereed]
T. Okumura, S. Toyoda, F. Sato, A. Uchida, J. Ishibashi, S. Nakai
Geochronometria   37(1) 57-61   Jan 2010   [Refereed]
Electron Spin Resonance (ESR) dating of marine barite in chimneys deposited from hydrothermal vents was attempted to determine the time since hydrothermal activity occurred. In this study, we used Barite (BaSO4) precipitated in icroenvironments in...
Y. Yamamoto, S. Toyoda, K. Nagasima, Y. Igarashi, R. Tada
Geochronometria   37(1) 9-12   Jan 2010   [Refereed]
The grain size influence on the number of oxygen vacancies in quartz was investigated by ESR in atmospheric deposition collected at two Japanese cities, Fukuoka and Akita, in 1969 and 1971. The finer grain size fraction shows the highest value of ...
A. K. Srivastava, Praveen, M. Arora, S. K. Gupta, B. R. Chakraborty, S. Chandra, S. Toyoda, H. Bahadur
Journal of Materials Science and Technology   26(11) 986-990   2010   [Refereed]
Zinc oxide (ZnO) thin films were grown on silicon substrate by RF (radio frequency) magnetron sputtering. Surface topography of these films exhibited a nanostructured granular appearance with the size of individual grains between 50 to 100 nm. Cor...
R. Tada, H. Zheng, N. Sugiura, Y. Isozaki, H. Hasegawa, Y. Sun, W. Yang, K. Wang, S. Toyoda
Geological Soc. London, Special Publications2010   342 45-65   Sep 2010   [Refereed]
The potential links between uplift of the Himalaya and Tibetan Plateau and desertification of inland Asia have been a long-considered problem in geology. Although a close link between the two has been suggested by theoretical climatic simulations,...
M. Sakamoto, A. Gucsik, H. Nishido, K. Ninagawa, T. Okumura, S. Toyoda
Meteoritics and Planetary Science   45(1) 32-42   Jan 2010   [Refereed]
Planar deformation features (PDFs) and planar fractures (PFs) have been found and confirmed by optical microscope observations and microRaman spectroscopy in quartz grains from Mt. Oikeyama (Akaishi Mountains, Central Japan), for which the semicir...
S. Toyoda, Y. Hino, A. A. Romanyakha, O. Tarasov, S. Pivovarov, M. Hoshi
Health Physics   98(2) 352-359   Feb 2010   [Refereed]
Imaging plates sensitive to beta rays were used to obtain the images of 90Sr in tooth samples taken from mammals collected in contaminated areas of the former Soviet Union. The average concentrations of 90Sr in the samples were determined by compa...
D. Bhattacharjee, A. I. Ivannikov, K. Zhumadilov, V. F. Stepanenko, K. Tanaka, S. Endo, M. Ohtaki, S. Toyoda, J. Bhattacharyya, M. Hoshi
Journal of Radiation Research   50(6) 559-565   Dec 2009   [Refereed]
Electron spin resonance (ESR) dosimetry of teeth is used extensively for dose estimation following exposure to radiation. The population inhabiting the northeast region of India is prone to different cancers of the head and neck, and their prevale...
A. K. Srivastava, K. Ninagawa, S. Toyoda, B. R. Chakraborty, S. Chandra
Optical Materials   32(2) 410-413   Dec 2009   [Refereed]
We report an in situ analysis of thermally stimulated luminescence (thermoluminescence, TL) of a sol–gel derived nanostructured ZnO. The quenching of thermoluminescence with Fe-doping in ZnO has also been investigated. A prominent emission spectra...
T. Okumura, A. Gucsik, H. Nishido, K. Ninagawa, S. Toyoda
“Micro-Raman Spectroscopy and Luminescence Studies in the Earth and Planetary Sciences.” American Institute of Physics   1163 148-154   2009   [Refereed]
The ballen silica shows fairly weak (faint) CL with homogeneous feature in its grain exhibiting almost same spectral pattern with two broad band peaks at around 390 and 650 nm, which might be assigned to self‐trapped excitons (STE) or an intrinsic...
J. Ishibashi, S. Nakai, S. Toyoda, H. Kumagai, T. Noguchi, O. Ishizuka
J. Geogr.   118(6) 1186-1204   Dec 2009   [Refereed]
As our understanding of seafloor hydrothermal systems grows, we recognize they are not always stable and sometimes show dramatic changes. In this review, the authors present a compilation of geochemical and geochronological studies that are helpfu...
K. Zhumadilov, A. Ivannikov, D. Zharlyganova, Z. Zhumadilov, V. Stepanenko, K. Apsalikov, M. R. Ali, A. Zhumadilova, S. Toyoda, S. Endo, K. Tanaka, T. Okamoto, M. Hoshi
Radiation and Environmental Biophysics   48(4) 419-425   Nov 2009   [Refereed]
The method of electron spin resonance (ESR) dosimetry has been applied to human tooth enamel, to obtain individual absorbed doses of residents of settlements in vicinity of Ust-Kamenogorsk city, Kazakhstan (located about 400 km to the east from th...
T. Usami, S. Toyoda, H. Bahadur, A.K. Srivastava, H. Nishido
Physica B: Condensed Matter   404(20) 3819-3823   Nov 2009   [Refereed]
The growth of E1′ centers in a variety of natural and synthetic quartz crystals has been investigated by employing the electron spin resonance technique. It has been reported that the growth of E1′ centers, formed by irradiation and subsequent ann...
A. Uchida, S. Toyoda, H. Tissoux, C. Falguères, K. Ninagawa
Advances in ESR Applications   25 4-6   Mar 2009   [Refereed]
Y. Yamamoto, S. Toyoda, Y. Isozaki, Y. Sun, R. Tada, K. Nagasima, A. Tani
Advances in ESR Applications   25 7-12   Mar 2009   [Refereed]
S. Toyoda, H. Miura, H. Tissoux
Radiation Measurements   44(5-6) 483-487   May 2009   [Refereed]
Electron spin resonance (ESR) dating has been applied previously to quartz derived from tephra deposits using the additive dose method. In this study we compare results obtained using both additive dose and regeneration dose methods on a Japanese ...
Paramagnetic defects in quartz as the proxies for provenance of Aeolian and fluvial sediments
S. Toyoda, K. Hosogi, K. Nagashima, Y. Isozaki, Y. Sun, R. Tada
International Conference on Luminescence and its Applications (ICLA-2008)   18 165-167   Feb 2009
The effect of Al center to the formation of E1' center in Quartz
T. Usami, S. Toyoda, H. Bahadur
International Conference on Luminescence and its Applications (ICLA-2008)   18 162-164   Feb 2009
Paramagnetic defects in quartz as the proxies for provenance of aeolian and fluvial sediments
S. Toyoda, K. Hosogi, K. Nagashima, Y. Isozaki, Y. Sun, R. Tada
Proceedings of the Third International Conference on Luminescence and its Applications   36-38   Feb 2008
Y. Isozaki, R. Tada, Y. Sun, K. Nagashima, H. Zheng, S. Toyoda, A. Tani
Climate of the Past Discussions   4 335-374   Mar 2008   [Refereed]
It is suggested that the uplift of Himalaya-Tibetan Plateau enhanced interior aridity in East Asia and resulted in development of middle latitude gobi and sandy deserts and accumulation of the eolian sediments in the Chinese Loess Plateau. Therefo...
H. Bahadur, K. Ninagawa, H. Nisido, T. Usami, M. Kayama, S. Toyoda
Proceedings for the 2008 IEEE International Frequency Control Symposium   213-218   Nov 2008   [Refereed]
Premium Q and Supreme Q are the grades of high quality commercially available cultured quartz from Sawyer Applied Research Products, OH and Toyo Communication Equipment Company, Kawasaki, Japan. These grades of materials are generally used as reso...
H. Tissoux, S. Toyoda, C. Falgueres, P. Voinchet, M. Takada, J.-J. Bahain and J. Despriee
Geochronometria   30(1) 23-31   Apr 2008   [Refereed]
One sample from a fluvial terrace of Loir river (France) deposited during isotopic stages 7-8 and two samples from isotopic stage 5 marine sediments of Echizen Coast (Japan) were dated by ESR of quartz grains. Both additive and regenerative techni...
T. Okumura, H. Nishido, S. Toyoda, T. Kaneko, S. Kosugi, Y. Sawada, K. Komuro
Quatern. Geochronol.   3(4) 342-345   Nov 2008   [Refereed]
Detailed quantitative cathodoluminescence (CL) imaging analysis was carried out for radiation-damage halos observed by CL (CL halo) created in natural quartz by implantation of 4 MeV He+ ions. The band of CL halo was approximately 14 μm in width a...
Y. Sun, R. Tada, J. Chen, Q. Liu, S. Toyoda, A. Tani, J. Ji, Y. Isozaki
Geophys. Res. Lett   35(1) L01804   Jan 2008   [Refereed]
Eolian dust deposits in north China provide an excellent means of determining past variations in continental paleoclimate and atmospheric circulation. However, debate still exists on which deserts in east Asia are the dominant sources of Chinese l...
日野幸胤、豊田新、A. Romanyukha, 田中憲一、星正治
Advances in ESR Applications   24 8-12   Feb 2008   [Refereed]
H. Bahadur, H. Tissoux, T. Usami, S. Toyoda
Journal of Materials Science   19(8-9) 709-713   Sep 2008   [Refereed]
Optically clear, as visually observed, natural quartz crystals of Brazilian and Arkansas origins, which exhibit Al–OH−-centers in their as-received conditions, have been measured for their low temperature ESR spectra to see the presence of Al-hole...
K. Zhumadilov, V. Stepanenko, A. Ivannikov, Z. Zhumadilov, D. Zharlyganova, S. Toyoda, K. Tanaka, S. Endo, M. Hoshi
Radiation and Environmental Biophysics   47(4) 541-545   Nov 2008   [Refereed]
The contribution of radiation from X-ray baggage scans at airports on dose formation in tooth samples was investigated by electron spin resonance (ESR) dosimetry and by glass dosimetry. This was considered important, because tooth samples from pop...
K. Tanaka, S. Endo, S. Toyoda, E. Tieliewuhan, A. Romanyukha, M. Hoshi
Radiat. Environ. Biophys.   46(3) 215-220   Aug 2007   [Refereed]
Recently, a numerical method was proposed to correct the imaging plate (IP) response to 90Sr concentration in tooth samples, depending on the sample thickness. This is important to quantify any 90Sr concentration in teeth, which in turn is necessa...
Y. Sun, R. Tada, J. Chen, H. Chen, S. Toyoda, A. Tani, Y. Isozaki, K. Nagashima, H. Hasegawa and J. Ji
Atmospheric Environment   41(38) 8537-8548   Dec 2007   [Refereed]
We report a newly developed provenance-tracing method by using a combination of electron spin resonance (ESR) signal intensity of the E1′ center in quartz and crystallinity index (CI) of quartz, which reflect the formation age and crystallization ...
K. Fujie, Y. Kitagawa, M. Saito, S Toyoda, T. Naruse
PEDOLOGIST   51(2) 56-67   Dec 2007   [Refereed]
Because the content of insoluble residue is a little in limestone, it is a problem for many years what is the parent materials of dark red soils distributed on limestone. In this paper, it was investigated that properties and uniformity of parent ...
T. Fujita, Y. Kitagawa, T. Okuda, K. Fujie, M. Saito, S. Toyoda, T. Naruse
PEDOLOGIST   51(2) 68-75   Dec 2007   [Refereed]
The ESR-signal intensity associated with the oxygen vacancy in the silt sized fine quartz and the clay mineral composition were examined, in order to investigate the influence of eolian dust on the parent materials in two Red-Yellow soils develope...
T. Okuda, T. Fujita, K. Fujie, Y. Kitagawa, M. Saito, T. Naruse, S. Toyoda
PEDOLOGIST   51(2) 104-110   Dec 2007   [Refereed]
The ESR-signal intensity associated with the oxygen vacancy in the fine quartz and the clay mineral composition were examined, in order to investigate the influence of eolian dust on the parent materials in a fine-textured Brown Forest soil develo...
T. Fujita, T. Okuda, K. Fujie, Y. Kitagawa, M. Saito, S. Toyoda, T. Naruse
PEDOLOGIST   51(2) 97-103   Dec 2007   [Refereed]
The ESR-signal intensity associated with the oxygen vacancy in the fine quartz and the clay mineral composition were examined, in order to investigate the influence of eolian dust brought from the northern Asia continent on the parent materials in...
T. Fujita, Y. Kitagawa, T. Okuda, K. Fujie, M. Saito, S. Toyoda, T. Naruse
PEDOLOGIST   51(2) 89-96   Dec 2007   [Refereed]
The ESR-signal intensity associated with the oxygen vacancy in the fine quartz and the clay mineral composition were examined in order to investigate the influence of eolian dust on the parent materials in two fine texured Brown Forest soils devel...

Books etc

 
Oxide nanostructures: growth, microstructures, and properties
A. K. Srivastava ed. (Part:Contributor, Paramagnetic lattice defects in natural crystalline quartz)
Pan Stanford Publishing, Singapore   Apr 2014   ISBN:9789814411356
Nanomaterials, their synthesis, and property studies have been an obsession with modern current physicists, chemist, and materials scientists for their vast array of technological implications and the remarkable way their properties are modified o...
Advances in Nanodevices and Nanofabrication
Q. Zhang, W. I. Milne, J. Zou eds. (Part:Contributor, Revelation on temperature-dependent cathodoluminescence by employing nanostructural pathway in Fe-incorporated ZnO)
Pan Stanford Publishing   Jul 2012   ISBN:9789814364546
A variety of devices at nanometer/molecular scale for electronic, photonic, optoelectronic, biological, and mechanical applications have been created through the rapid development of materials and fabrication technology. Further development of nan...

Conference Activities & Talks

 
The Ages of the Sea-floor Hydrothermal Activities in the Okinawa Trough and in the Izu-Ogasawara Arc: ESR and Radioactive Disequilibrium Dating of Sulfate Minerals
S. Toyoda, T. Fujiwara, A. Uchida, J. Ishibashi
2018 AGU Fall Meeting   Dec 2018   
Dose response of the E1’center in quartz
S. Toyoda
The 5th Asia Pacific Conference on Luminescence and Electron Spin Resonance Dating (APLED2018)   Oct 2018   
Quartz ESR signals for dating and for other applications [Invited]
S. Toyoda
14th International Conference on Luminescence and Electron Spin Resonance   Jul 2018   
Retrospective ESR/EPR cattle tooth enamel doses given by the radioactive nuclei released by the accident of Fukushima Dai-ichi atomic power plants
S. Toyoda, M. Murahashi, M. Natsuhori, S. Ito, A. Ivannikov
EPR Biodose 2018 Conference   Jun 2018   
Assessment of exposure doses to uranium personnel of the OP-21 mining enterprise and the population of the adjacent territories of Northern Kazakhstan using tooth enamel EPR method
K. Zhumadilov, A. Ivannikov, A. Khailov, S. Orlenko, B. Abyshev, V. Skvortsov, V. Stepanenko, S. Toyoda, M. Hoshi
EPR Biodose 2018 Conference   Jun 2018   
ESR (EPR) dosimetry with human deciduous, rat, and cattle teeth
M. Murahashi, S. Toyoda, M. Hoshi, M. Ohtaki, N. Fujimoto, C. Miyazawa, Y, Yamada, M. Natsuhori
2018 Health Physics Society Midyear Meeting & Exhibition   Feb 2018   
Suitability of tooth enamel from Japanese wild boar for use as a dosimeter with electron spin resonance dosimetry
A. Harshman, S. Toyoda, T. Johnson
2018 Health Physics Society Midyear Meeting & Exhibition   Feb 2018   
A new standard for EPR (ESR) retrospective radiation dosimetry with tooth enamel: standardization of the method
S. Toyoda, A. Ivannikov, M. Murahashi
2018 Health Physics Society Midyear Meeting & Exhibition   Feb 2018   
ESR signals in quartz of the Cretaceous sedimentary sequence at the southeast Gobi desert in Mongolia
Y. Nitta, S. Toyoda, Y. Saneyoshi, S. Ishigaki, H. Asai, S. Tsutanaga, K. Tsogtbaatar
第34回ESR応用計測研究会・2017年度ルミネッセンス年代測定研究会・第42回フィッション・トラック研究会 合同研究発表会   Feb 2018   
Universal standard for tooth enamel dosimetry
S. Toyoda, M. Murahashi, A. Ivannikov
第34回ESR応用計測研究会・2017年度ルミネッセンス年代測定研究会・第42回フィッション・トラック研究会 合同研究発表会   Feb 2018   
Comparison of ESR signals in various mammalian teeth enamel
M. Murahashi, S. Toyoda, M. Hoshi, M. Ohtaki, A. Ivannikov, M. Natsuhori, Y. Yamada
第34回ESR応用計測研究会・2017年度ルミネッセンス年代測定研究会・第42回フィッション・トラック研究会 合同研究発表会   Feb 2018   
ESR dosimetry with rat teeth : dose response and applications
M. Murahashi, S. Toyoda, M. ohtaki, N. Fujimoto, K. Zhumadilov, M. Hoshi
21th Hiroshima International Symposium : Studies on health effects of exposure to radioactive micro-particles   Jan 2018   
ESR signals in quartz for the studies of earth surface processes
S. Toyoda, A. Shimada, M. Takada
2017 AGU Fall Meeting   Dec 2017   
ESR dating of sulfate minerals in sea-floor thydrothermal deposits in comparison with radioactive disequilibrium ages
T. Fujiwara, S. Toyoda, A. Uchida, J. Ishibashi, S. Nakai
15th International Conference on Luminescence and Electron Spin Resonance Dating   Sep 2017   
Comparison and correlation of upper Cretaceous sedimentary sequence in Southern Mongolia with ESR and luminescence
S. Toyoda, H. Asai, Y. Nitta, M. Saneyoshi, H. Nishido, K. Aoki, T. Imayama, S. Ishigaki, K. Tsogtbaatar, B. Mainbayar
15th International Conference on Luminescence and Electron Spin Resonance Dating   Sep 2017   
ESR tooth enamel dosimetry with cattle teeth
M. Murahashi, S. Toyoda, M. Natsuhori
4th Asian Congress of Radiation Research (ACRR2017)   Aug 2017   
Tooth enamel EPR dosimetry study of hiroshima atomoic bomb victims
K. Zhumadilov, A. Ivannikov, S. Toyoda, S. Aya, V. Stepanenko, M. Hoshi
4th Asian Congress of Radiation Research (ACRR2017)   Aug 2017   
Dosimetry study of internal exposure to neutron-activated 56Mn dioxide powder in wistar rats: results of international cooperative research
V. Stepanenko, M. Hoshi, N. Fujimoto, N. Kawano, S. Endo, K. Shichijo, M. Nakashima, A. Sakaguchi, S. Toyoda, H. Sato, T. Rakhypbekov, N. Chaizhunusova, D. Shabdarbaeva, N. Aukenov, N. Sayakenov, D. Uzbekov, A. Saimova, Y. Kairkhanova, A. Kaprin, S. Ivanov, T. Kolyzhenkov, A. Petukhov, K. Zhumadilov, A. Azimkhanov, A. Kolbayenkov, U. Akhmedova, V. Bogacheva
4th Asian Congress of Radiation Research (ACRR2017)   Aug 2017   
Estimation of external and internal irradiation on staff of uranium processing plant by tooth enamel EPR spectroscopy
K. Zhumadilov, A. Ivannikov, A. Khailov, S. Orlenko, V. Skvortsov, V. Stepanenko, K. Kuterbekov, S. Toyoda, P. Kazymbet, M. Hoshi
4th Asian Congress of Radiation Research (ACRR2017)   Aug 2017   
Internal exposure experiments 56Mn using rats Simulating Radioactive soil dust exposure in Hiroshima and Nagasaki
M. Hoshi, V. Stepanenko, T. Rakhypbekov, N. Chaizhunusova, M. Ohtaki, K. Otani, N. Fujimoto, K. Shichijo, D. Shabdarbaeva, K. Zhumadilov, N. Aukenov, N. Sayakenov, D. Uzbekov, A. Saimova, Y. Kairkhanova, S. Mazhin, A. Vurim, V. Gnyrya, A. Azimkhanov, A. Kolbayenkov, B. Toikin, K. Kanapyianov, K. Satoh, N. Kawano, S. Endo, M. Nakashima, T. Takatsuji, N. Takeuchi, Y. Noso, K. Inoue, A. Sakaguchi, H. Kato, Y. Onda, S. Toyoda, H. Sato, A. Kaprin, V. Galkin, S. Ivanov, T. Kolyzhenkov, E. Yaskova, I. Belukha, A. Khailov, A. Petukhov, U. Akhmedova, V. Bogacheva
4th Asian Congress of Radiation Research (ACRR2017)   Aug 2017   
External doses given to the rats in the 56Mn inhalation experiments, measured by rat tooth ESR dosimetry
M. Murahashi, S. Toyoda, M. Hoshi, M. Ohtaki, N. Fujimoto, S. Endo, K. Tanaka
4th Asian Congress of Radiation Resea rch (ACRR2017)   Aug 2017   
TL and OSL of Ordinary Chondrites
K. Ninagawa, H. Mandai, Y. Motoyosihi, S. Toyoda, N. Obata
The 33rd Workshop on ESR Applied Metrology   Mar 2017   
Radioactive disequilibrium and ESR age of hydrothermal anhydrite taken the Okinawa Trough
T. Fujiwara, S. Toyoda, A. Uchida, J. Ishibashi, S. Nakai
The 33rd Workshop on ESR Applied Metrology   Mar 2017   
Use of animal teeth for ESR tooth enamel dosimetry
M. Murahashi, S. Toyoda, M. Hoshi, M. Ohtaki, N. Fujimoto, S. Endo, K. Tanaka
The 33rd Workshop on ESR Applied Metrology   Mar 2017   
Effect of low energy scattered gamma rays on tooth enamel ESR dosimetry
S. Toyoda, M. Murahashi, H. Koyama, K. Tanaka, H. Sato, S. Endo, T. Kajimoto, M. Hoshi
The 33rd Workshop on ESR Applied Metrology   Mar 2017   
Dating of barite and anhydrite in sea-floor hydrothermal deposits in the Okinawa Trough
T. Fujiwara, S. Toyoda, A. Uchida, J. Ishibashi, S. Totsuka, K. Shimada, S. Nakai
2016 AGU Fall Meeting   Dec 2016   
Thermoluminescence study of quartz from the Sambagawa metamorphic belt, Central Shikoku, Japan
T. Chuenpee, O. Nishikawa, Y. Kon, K. Ninagawa, S. Toyoda, T. Ogata, T. Uchida, I. Takashima
2016 AGU Fall Meeting   Dec 2016   
ESR signals of quartz in the present river bed sedmiments and in the possible source rocks
A. Shimada, M. Takada, S. Toyoda
RSC Tokyo International Conference 2016   Sep 2016   
Stratigraphic assignment of eolian sediments in the Central Gobi Sesert, Mongolia using an indicator of defect centers in quartz composed of sand particle
H. Asai, M. Saneyoshi, H. Nishido, S. Toyoda, Kh. Tsogtbaatar, B. Mainbayar
The 70th Anniversary of Mongolian Paleontological Expedition of Academy of Sciences, USSR   Sep 2016   
Tooth enamel EPR dosimetry study for residents of East Kazakhstan
K. Zhumadilov, A. Ivannikov, S. Toyoda, V. Stepanenko, V. Skvortsov, M. Hoshi
18th International Conference on Solid State Dosimetry   Jul 2016   
Use of deciduous teeth fou ESR tooth enamel dosimetry
M. Murahashi, S. Toyoda, M. Hoshi, M. Ohtaki, S. Endo, K. Tanaka
18th International Conference on Solid State Dosimetry   Jul 2016   
ESR dating of barite in see-floor hydrothermal deposits a new dating technique
S. Toyoda, T. Fujiwara, A. Uchida, J. Ishibashi
Goldschmidt 2016   Jun 2016   
Mineralogical and Geochemical study of hydrrothermal deposits, a new dating technique
S. Totsuka, J. Ishibashi, T. Fujiwara, A. Uchida, S. Toyoda, T. Nozaki
Goldschmidt 2016   Jun 2016   
The influence of U, Th mobility in hydrothermal fluids on U-Th radioactive Disequilibrium dating of sulphide minerals
S. Nakai, A. Takamasa, R. Yoshizumi, T. Urabe, T. Fujiwara, S. Toyoda, J. Ishibashi
Goldschmidt 2016   Jun 2016   
Radioactive disequilibrium and ESR dating of barite in sea-floor hydrothermal deposits of the Okinawa Trough
T. Fujiwara, S. Toyoda, A. Uchida, J. Ishibashi, S. Totsuka, K. Shimada, S. Nakai
Goldschmidt 2016   Jun 2016   
Modeling of beta-irradiation following Hiroshima A-bombing: results of internal dose estimations in experimental animals exposed to neutron activated 56Mn powder
V. Stepanenko, T. Rakhypbekov, M. Ohtaki, K. Otani, K. Satoh, N. Kawano, K. Shichijo, M. Nakashima, T. Takatsuji, A. Sakaguchi, H. Kato, Y. Onda, N. Fujimoto, S. Toyoda, H. Sato, A. Dyussupov, N. Chaizhunusova, N. Sayakenov, D. Uzbekov, A. Saimova
Program of the 20th Hiroshima International Symposium, Challenges to Estimation of Health Risks Due to Exposure to Radioactive Fallout   Jan 2016   
Estimation of beta- and gamma- dose in quartz containing samples from Hiroshima and Nagasaki cities and Fukushima Prefecture using single grain OSL technique: preliminary results
V. Stepanenko, A. Petukhova, M. Hoshi, S. Endo, M. Ohtaki, N. Kawano, Y. Takihara, K. Satoh, K. Tanaka, T. Kajimoto, T. Takatsuji, H. Sato, S. Toyoda, A. Kaprin, S. Ivanov, T. Kolyzhenkov, A. Khailov, U. Khasaeva, V. Bogacheva
Program of the 20th Hiroshima International Symposium, Challenges to Estimation of Health Risks Due to Exposure to Radioactive Fallout   Jan 2016   
Internal exposure and beta rays: subjects to be considered more related to radiation exposures
M. Hoshi, V. Stepanenko, T. Rakhypbekov, M. Ohtaki, K. Otani, K. Satoh, N. Kawano, K. Shichijo, M. Nakashima, T. Takatsuji, A. Sakaguchi, H. Kato, Y. Onda, N. Fujimoto, S. Toyoda, H. Sato, A. Dyussupov, N. Chaizhunusova, N. Sayakenov, D. Uzbekov, A. Saimova, D. Shabdarbaeva, A. Azimkhanov, A. Kolbayenkov, Y. Kairkhanova, A. Kaprin, S. Ivanov, T. Kolyzhenkov, K. Zhumadilov, A. Petukhov
20th Hiroshima International Symposium, Challenges to Estimation of Health Risks Due to Exposure to Radioactive Fallout   Jan 2016   
Advantages in using deciduous teeth for ESR tooth enamel dosimetry
S. Toyoda, M. Murahashi, M. Hoshi, M. Ohtaki
20th Hiroshima International Symposium, Challenges to Estimation of Health Risks Due to Exposure to Radioactive Fallout   Jan 2016   
ESR dosimetry study for residents of Kazakhstan
K. Zhumadilov, A. Ivannikov, S. Toyoda, V. Stepanenko,V. Skvortsov, M.Hoshi
Program of the 20th Hiroshima International Symposium, Challenges to Estimation of Health Risks Due to Exposure to Radioactive Fallout   Jan 2016   
ESR dating of hydrithermal anhydrite: the first trial
T. Fujiwara, S.Toyoda, A.Uchida, J.Ishibashi
4th Asia Pacific luminescence and election spin resonance dating conference, APLED 2015   Nov 2015   
The alpha effectiveness of the ESR dating signal in hydrothermal barite
T. Fujiwara, S.Toyoda, A.Uchida, H.Nishido, J.Ishibashi
4th Asia Pacific luminescence and election spin resonance dating conference, APLED 2015   Nov 2015   
ESR and TL signals of quartz in the present river bed sediments and impossible source rocks
A. Shimada, M.Takada, S. Toyoda
4th Asia Pacific luminescence and election spin resonance dating conference, APLED 2015   Nov 2015   
ESR dating of sea-floor hydrothrmal barite: Contribution of 228Ra to the dose rate
S. Toyoda, T.Fujiwara, A.Uchida, J.Ishibashi
4th Asia Pacific luminescence and election spin resonance dating conference, APLED 2015   Nov 2015   
ESR dosimetry study for population residing in the vicinity of fallout path of nuclear test in August 7, 1962
K. Zhumadilov, A. Ivannikov, S. Toyoda, V. Stepanenko, M. Hoshi
EPR Biodose 2015   Oct 2015   
ESR tooth enamel dosimetry, deciduous teeth, retrospective dosimetry
S. Toyoda, M. Murahashi, M. Hoshi, M. Ohtaki
EPR Biodose 2015   Oct 2015   
Innovations and Challenges in Quaternary Geochronology: methodological developments, applications and new horizons
L. Zhou, R. Grun, T. Nakamura, A. Singhvi, S. Toyoda, session convenors
19th INQUA Congress   Jul 2015   
Dating of Quaternary tephras using Optical and ESR methods: Reliability test and improving the methodology
R. H Biswas, S. Toyoda, T. Suzuki
19th INQUA Congress   Jul 2015   
ESR signals and TL colors in quartz for mixture and provenance of river and ocean sediments
S. Toyoda, M. Yoshida, Y. Nosohara, K. Uchihori, A. Shimada, M. Takada
19th INQUA Congress   Jul 2015   
Characteristic of ESR and TL signals in quartz by a change in mixture ratios of various rocks
A. Shimada, M. Takada, S. Toyoda
19th INQUA Congress   Jul 2015   
Electron spin resonance dosimetry with deciduous teeth: variation of the sensitivity
S. Toyoda, Y. Nakagawa, M. Hoshi, M. Ohtaki
15th International Congress on Radiation Research (ICRR2015)   May 2015   
Dating and heated temperature estimation by quartz electron spin resonance (ESR)
S. Tsukamoto, M.W. Wuttke, S.Toyoda, A.Tani, F.Oppermann
75th Annual Conference of the German Geophysical Society   Mar 2015   
Quantitative analysis with ESR signals and TL colors in quartz for mixture and provenance of river sediments [Invited]
S. Toyoda
International Conference on Luminescence and Applications (ICLA2015)   Feb 2015   
Role of band-tail states of feldspar in anomalous fading of IRSL
R. H. Biswas, P. Porthekai, S. Toyoda
平成26年度第39回フィッション・トラック研究会・ESR応用計測研究会・ルミネッセンス研究会合同研究会   Feb 2015   
ESR, 226Ra-210Pb, and 228Ra-228Th dating of barite in sea-floor hydrothermal sulfide deposits in the Okinawa Trough
S. Toyoda, T. Fujiwara, A. Uchida, J. Ishibashi, S. Nakai, A. Takamasa
21st General Meeting of the International Mineralogical Association (IMA2014)   Sep 2014   
ESR of quartz, barite and hydroxyapatite: Applications to dating and retrospective dosimetry [Invited]
S. Toyoda, M. Asagoe, T. Fujiwara, Y.Nakagawa
International Conference on Luminescence and ESR dosimetry (LumiDoz8)   Aug 2014   
ESR dating of barite in sea-floor hydrothermal sulfide deposits in comparison with 226Ra-210Pb and 228Ra-228Th ages
T. Fujiwara, S. Toyoda, A. Uchida, J. Ishibashi, S. Nakai, A. Takamasa
14th International Conference on Luminescence and Electron Spin Resonance   Jul 2014   
Determination of paramagnetic centers in archaological pottery of Turkey: an ESR study
U. Sayin, G. Bakkal, I. Isik, S. Toyoda, A. Ozmen, H. S. Kilic
14th International Conference on Luminescence and Electron Spin Resonance   Jul 2014   
Temporal change of TL and ESR signals in quartz extracted from Kurobe River sediments
M. Yoshida, S. Toyoda, K. Ninagawa, M. Takada, A. Shimada
14th International Conference on Luminescence and Electron Spin Resonance   Jul 2014   
Evaluation of ESR residual dose in quartz modern samples, and investigation into environmental dependence
P. Voinchet, S. Toyoda, C. Falguères, M. Hernandez, H. Tissoux, D. Moreno, J. J. Bahain
14th International Conference on Luminescence and Electron Spin Resonance   Jul 2014   
Characteristics of ESR/ TL/ SEM-EDS signalas of natural quartz from bedrocks and river bed sediments
A. Shimada, M. Takada, S. Toyoda, K. Ninagawa, H. Muto
14th International Conference on Luminescence and Electron Spin Resonance   Jul 2014   
Multiple luminescence and ESR dating approaches to date Japanese marker tephra
R. H. Biswas, S. Toyoda, M. Takada, Y. Shitaoka, N. Hamada, M. Asagoe
14th International Conference on Luminescence and Electron Spin Resonance   Jul 2014   
Quartz ESR signals for dating and for other applications [Invited]
S. Toyoda
14th International Conference on Luminescence and Electron Spin Resonance   Jul 2014   
ESR dating of tephra with dose revoverty test for impurity centers in quartz
M. Asagoe and S. Toyoda
14th International Conference on Luminescence and Electron Spin Resonance   Jul 2014   
Investigation of the temporal change of the sources of aeolian dust deliverdd to Japan using electron spin resonance signals in quartz
S. Toyoda, Y. Yamamoto, K. Nagashima, Y. Igarashi, R. Tada
11th Annual Meeting, Asia Oceania Geosceinces Society   Jul 2014   
ESR, 226Ra-210Pb and 228Ra-228Th dating of barite in sea-floor hydrothermal sulfide deposits in the Okinawa Trough
T. Fujiwara, S. Toyoda, A. Uchida, J. Ishibashi, S. Nakai, A. Takamasa
Goldschmidt California 2014   Jun 2014   
ESR dating of barite in sea-floor hydrothermal sulfide deposits at Okinawa Trough
T. Fujiwara, S. Toyoda, A. Uchida, J. Ishibashi, S. Nakai, A. Takamasa
2013 AGU (American Geophysical Union) Fall Meeting   Dec 2013   
Signatures of ESR signals and TL observed in quartz of Kizu river sediments and in host rocks
Y. Nosohara, S. Toyoda, M. Takada, A. Shimada, Y. Masanori
2013 AGU (American Geophysical Union) Fall Meeting   Dec 2013   
The alpha effectiveness for formation of SO3- in barite: an essential factor for ESR dating of submarine hydrothermal barite
Y. Isono, S. Toyoda, H. Nishido, M. Kayama
2013 AGU (American Geophysical Union) Fall Meeting   Dec 2013   
U-Th dating of sulfide minerals from a hydrothermal vent -comparisons with other dating methods-
A. Takamasa, S. Nakai, S. Toyoda, F. Sato, T. Fujiwara, J. Ishibashi
Japan Geoscience Union Meeting 2013   May 2013   
Uplift history of the Kunlun Mountains based on provenance of coarse fraction of fluvial sediment since 8Ma
A. Karasuda, R. Tada, Zheng Hongbo, S. Toyoda, H. Hasegawa, Y. Isozaki, T. Yoshida
Japan Geoscience Union Meeting 2013   May 2013   
Volcanic history of the Oomurodashi, northern Izu-Bonin Arc
K. Tani, H. Shukuno, Y. Hirahara, Y. Masaki, Alexander Nichols, O. Ishizuka, Richard S. Fiske, Katharine V. Cashman, Philip T. Leat, Rebecca Carey, Iona M. McIntosh, A. Onoue, M. Asagoe, S. Toyoda
Japan Geoscience Union Meeting 2013   May 2013   
ESR dating of tephra with dose recovery test for impurity centers in quartz
M. Asagoe, S. Toyoda
Japan Geoscience Union Meeting 2013   May 2013   
The alpha effectiveness for formation of SO3- in barite : an application to ESR dating
Y. Isono, S. Toyoda, H. Nishido, M. Kayama
Japan Geoscience Union Meeting 2013   May 2013   
ESR dating of barite in sea-floor hydrothermal sulfide deposits
T. Fujiwara, S. Toyoda, J. Ishibashi, S. Nakai, A. Uchida, A. Takamasa
Japan Geoscience Union Meeting 2013   May 2013   
Temporal change of the sources of Aeolian dust delivered to East Asia revealed by ESR signal and Crystallinity Index
Y. Yamamoto, S. Toyoda, K. Nagashima, Y. Igarashi, R. Tada
Japan Geoscience Union Meeting 2013   May 2013   
Signatures of ESR signals observed in quartz of Kizu river sediments and in host rocks
Y. Nosohara, S. Toyoda, M. Takada, A. Shimada
Japan Geoscience Union Meeting 2013   May 2013   
Estimate of the origin of the river sediment in the Kurobe River basin using TL and the ESR
M. Yoshida, S. Toyoda, K. Ninagawa, M. Takada, A. Shimada
Japan Geoscience Union Meeting 2013   May 2013   
U-Th radioactive disequilibrium dating of hydrothermal vent of Okinawa and South Mariana Trough
A. Takamasa, S. Nakai, J. Ishibashi, F. Sato, S. Toyoda, T. Fujiwara
Japan Geoscience Union Meeting 2013   May 2013   
ESR dating of barite: practical applications to submarine hydrothermal sulfide depositions in Okinawa and in South Mariana, in comparison with U-Th ages
S. Toyoda, T. Fujiwara, J. Ishibashi, Y. Isono, A. Uchida, A. Takamasa, S. Nakai
BIODOSE2013   Mar 2013   
ESR dosimetry study of population residing in the vicinity of the uranium mine and uranium processing plants
K. Zhumadilov, A. Ivannikov, P. Kazymbet, M. Bakhtin, D. Zharlyganova, S. Toyoda, Z. Zhumadilov, M. Hoshi
BIODOSE2013   Mar 2013   
Chemical characteristics of magma and related seafloor sulfide deposits on back-arc spreading center and off-ridge volcanoes in Southern Mariana Trough
T. Urabe, S. Kanamori, J. Ishibashi, K. Kentaro, H. Sato, S.Kato, S. Toyoda
2012 AGU (American Geophysical Union) Fall Meeting   Dec 2012   
Radon loss from barite in submarine hydrothermal sulfide deposits
A. Uchida, S. Toyoda, J. Ishibashi
2012 AGU (American Geophysical Union) Fall Meeting   Dec 2012   
ESR dating of submarine hydrothermal activities using barite in sulfide deposition
S. Toyoda, T. Fujiwara, J. Ishibashi, Y. Isono, A. Uchida, A. Takamasa, S. Nakai
2012 AGU (American Geophysical Union) Fall Meeting   Dec 2012   
U-Th and ESR dating of drilled cores from a giant hydrothermal mounds in South Mariana
A. Takamasa, S. Nakai, F. Sato, S. Toyoda, J. Ishibashi
2012 AGU (American Geophysical Union) Fall Meeting   Dec 2012   
Cathodoliminescence of He+-ion-implanted feldspars
M. Kayama, H. Nishido, S. Toyoda, K. Komuro, A.A. Finch, M.R. Lee, K. Ninagawa
3rd Asia Pacific Conference on Luminescence and Electron Spin Resonance Dating including non-dating applications   Nov 2012   
Provenance study of Asian dust based on ESR signal intensity of the E1’ center, crystallinity, and CL spectrum of quartz
K. Nagashima, S. Toyoda, Y. Yamamoto, H. Nishido, M. Kayama, R. Tada
3rd Asia Pacific Conference on Luminescence and Electron Spin Resonance Dating including non-dating applications   Nov 2012   
ESR dating of tephra with dose recovery test for impurity centers in quartz
M. Asagoe, S. Toyoda
3rd Asia Pacific Conference on Luminescence and Electron Spin Resonance Dating including non-dating applications   Nov 2012   
ESR dating of barite in sea-floor hydrothermal sulfide deposits taken from Okinawa Trough
T. Fujiwara, S. Toyoda, A. Uchida
3rd Asia Pacific Conference on Luminescence and Electron Spin Resonance Dating including non-dating applications   Nov 2012   
The alpha effectiveness for formation of SO3- in barite : an application to ESR dating
Y. Isono, S. Toyoda, H. Nishido, M. Kayama
3rd Asia Pacific Conference on Luminescence and Electron Spin Resonance Dating including non-dating applications   Nov 2012   
Estimation of equivalent doses by the robust regression
S. Toyoda, Y. Yokoyama
3rd Asia Pacific Conference on Luminescence and Electron Spin Resonance Dating including non-dating applications   Nov 2012   
Intercomparison of gamma ray dose rates calculated from U, Th, K concentrations and those measured by a Nal detector
A. Uchida, S. Toyoda, H.Tissoux, C. Falguères, K. Ninagawa
3rd Asia Pacific Conference on Luminescence and Electron Spin Resonance Dating including non-dating applications   Nov 2012   
Signatures of ESR signals observed in quartz of Kizu river sediments and in host rocks
Y. Nosohara, S. Toyoda, M. Takada, A. Shimada, M. Yoshida
3rd Asia Pacific Conference on Luminescence and Electron Spin Resonance Dating including non-dating applications   Nov 2012   
Applications of ESR signals and TL phenomena in quartz from rocks and sediments
A. Shimada, M. Takada, S. Toyoda
3rd Asia Pacific Conference on Luminescence and Electron Spin Resonance Dating including non-dating applications   Nov 2012   
Characteristics of 110°C TL and OSL signals in quartz from sediments and consolidated rocks: a clue to sediment provenance
M. Takada, A. Shimada, S. Toyoda
3rd Asia Pacific Conference on Luminescence and Electron Spin Resonance Dating including non-dating applications   Nov 2012   
Temporal change of the sources of aeolian dust delivered to East Asia revealed by electron spin resonance signals in quartz
Y. Yamamoto, S. Toyoda, K. Nagashima, R. Tada, Y.Igarashi
3rd Asia Pacific Conference on Luminescence and Electron Spin Resonance Dating including non-dating applications   Nov 2012   
ESR dating of barite in sea-floor hydrothermal sulfide deposits
Sep 2012   
ESR dating of barite in sea-floor hydrothermal sulfide deposits from Okinawa Trough
Sep 2012   
The alpha effectiveness for formation of SO3- in barite: an application to ESR dating
Sep 2012   
90Sr detected in mammal teeth in Semipalatinsk Nuclear Test Site using imaging plates
Sep 2012   

Research Grants & Projects

 
Ministry of Education, Culture, Sports, Science and Technology: Grants-in-Aid for Scientific Research(基盤研究(B))
Project Year: 2003 - 2005    Investigator(s): Shin TOYODA
ESR(electron spin resonance), TL(thermoluminescence), and OSL(optically stimulated luminescence) dating methods, based on the same principle, have wide applications of age determination in quaternary in the range beyond that of radiocarbon method....
Ministry of Education, Culture, Sports, Science and Technology: Grants-in-Aid for Scientific Research(基盤研究(B))
Project Year: 2003 - 2005    Investigator(s): Shin TOYODA
Radioactive nuclei released by radiation accidents of nuclear power plant and by nuclear tests caused serious contamination especially in former Soviet Union which has affected human health. It would be most useful to measure the ESR signal intens...
Ministry of Education, Culture, Sports, Science and Technology: Grants-in-Aid for Scientific Research(基盤研究(B))
Project Year: 2001 - 2002    Investigator(s): Shin TOYODA
After the World War II, former Soviet Union constructed its first plant complex in South Ural, which produces plutonium, starting its operation in 1948. There were three major accidents, such as contamination of Techa river, associated with this p...
Electron Spin Resonance Dating
Electron Spin Resonance Dosimetry
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