Kenji Motohashi, Tomoki Tachikawa, Takashi Uchida, and Kensei Kawamura
e-J. Surf. Sci. Nanotech. 16 127-131 May 2018 [Refereed]
In this study, we performed a mass-spectrometric study of cluster ions scattered on glass surfaces covered with ferrocene molecules under the incidence of 4.8 keV‒C60q+ (q = 1 and 2) ions. A couple of optical flats covered with 11-ferrocenyl-1-und...
Japanese Journal of Applied Physics 56 046301-1-046301-6 Mar 2017 [Refereed]
To investigate how the initial charge state affects the transmission of 4-MeV-C+ and -C4+ ion beams through a channel, we measured the transmission probability and kinetic energy of atoms and ions that pass through a cylindrical channel in glass, ...
Journal of Vacuum Science and Technology A 33(6) 061602-1-061602-7 Aug 2015 [Refereed]
Visible emission spectra were acquired from neutral atoms sputtered by 35–60 keV Krþ ions from a
polycrystalline tungsten surface. Mean velocities of excited tungsten atoms in seven different 6p
states were also obtained via the dependence of phot...
K. Motohashi, N. Miyawaki, K. Narumi and Y. Saitoh
QST Takasaki Annual Report 2017 QST-M-16 134-134 Mar 2019 [Refereed][Invited]
We have been developing the cylindrical glass channel (CGC), which comprises a cylindrically concave glass lens and a cylindrically convex glass lens facing each other with a gap of 1.2 mm. The transmission probability and the kinetic energy of ou...
Transmission Properties of a 6-MeV Fullerene Ion Beam through a Wedge-shaped Glass Channel
QST Takasaki Annual Report 2015 QST-M-2 182-182 Mar 2017 [Refereed][Invited]
The influence of initial charge states of 4-MeV ion beams on guiding effects were investigated by comparing C4+ with C+. The results obtained in this study is essentially means that the guiding effect was indeed in play under this investigative sc...
Kinetic Energy Distribution of 4-MeV-C4+ Ions
Kenji Motohashi, Yuichi Saito, Nobumasa Miyawaki, and Shiro Matoba
JAEA Review 2015-022 131-131 Feb 2016 [Refereed][Invited]
Kenji Motohashi, Seiji Tsurubuchi, and Akinori Koukitu
J. Phys.: Conference Series 80 012015 2007
Report on Cross Section Data Compilation for Electron and Ion Collisions with Molecules of Hydrogen Isotopes, Nitrogen, Oxygen, Hydrocarbons, Water and Carbon Oxide
M. Kimura, A. Igarashi, M. Imai, Y. Itikawa, M. Kitajima, T. Kusakabe, K. Moribayashi, T. Morishita, K. Motohashi, L. Pichl, R. Suzuki, D. Kato, I. Murakami, T. kato, and M. Kato
National Institute for Fusion Science Research Report NIFS-DATA-98 1-38 2006
High-efficiency and low-damage analysis of solid surfaces by use of highly-charged ions
K. Motohashi, S. tsurubuchi, and A. Koukitu
The 21st Century COE program on "Future Nano-Material" News Letter 4 18-19 2006
Review of Scientific Instrument 69(2 Pt.2) 694-696 1998
Emission cross sections for hydroden Lyman-α and-β produced in He+/Ar++H2 collisions.
Atomic Collision Research in Japan 24 65 1998
Emission cross section for hydrogen Lyman-α and-β produced in H-+Rg(He, Ne, Ar and Kr)collisions.
Atomic Collision Research in Japan 24 66 1998
The Tokyo Electron-Beam Ion Trap Experimental Program
S. Ohtani, J. Asada, T. Fukami, H. Hirayama, K. Motohashi, N. Nakamura, E. Nojikawa, K. Okazaki, H. Shiraishi, M. Sakurai, N. Tada, S. Tsurubuchi and H. Watanabe
20th International Conference on the Physics of Electronic and Atomic Collisions -Abstracts of Contributed Papers- 2 MO159 1997
Electron-Impact Emission Cross sections for the Resonance Lines of Ne
Atomic Colission Research In Japan 23 8 1997
Emission Cross Sections for Fragment Species Produced in He+H2 and in He+CH4
Atomic Collision Research in Japan 23 33-34 1997
Recent Progress of the Tokyo-Electron Beam Ion Trap
The 66th JSAP Spring Meeting, 2019 9 Mar 2019 The Japan Society of Applied Physics
Evaluation of guide effect for fullerene ion beam and argon ion beam using cylindrical glass channel
Kenji Motohashi
ECRIS meeting 26 Dec 2018
Guiding of 7.5 keV Ar3+ ion beam and focusing of 4 MeV C4+ ion beam using cylindrical glass channel[Invited]
Kenji Motohashi
TMU Symposium on Physics of Highly Charged Ions 2018 16 Dec 2018
Guiding of Ar3+ (7.5 keV) ion beam using cylindrical glass channel (CGC) was successfully observed. Small deflection due to tilt of the CGC was observed. Kinetic energy of transmitted ions almost preserved the initial energy. Ion transmission prob...
Kenji Motohashi, Shu Ishii, Kosuke Aoki, Naoya Tsuruta, and Shoutaro Kamon
43rd Annual Conference of the Atomic Collision Society og Japan 12 Oct 2018 The Atomic Collision Society of Japan
"Ion beam guiding effect" in which a low-energy multiply charged ion beam travels in a capillary tube and a bent tube by charging has been attracting attention. In order to investigate the effect of different shapes of concave and convex on the gu...
Kounosuke Muro, Kazunori Kato, and Kenji Motohashi
43rd Annual Conference of the Atomic Collision Society og Japan 12 Oct 2018 The Atomic Collision Society of Japan
In order to investigate the effect of the plasma activated medium (PAM), we examined the plasma irradiation time dependence of the PAM and the time (effective time) during which the effect was sustained. Furthermore, in order to investigate whethe...
The Physical Society of Japan 2018 Autumn Meeting 11 Sep 2018 The Physical Society of Japan
The ion-beam guiding, that is the transmission of low energy multi-charge ions in some tapered or curved insulator capillaries due to electric charging, have been received much attention. However, influence of the effect on shape of the inner wall...
In situ mass analysis of scattered particles in collisions between ions and thiol self-assembled monolayer surfaces terminated with ferrocene
Kensei Kawamura, Muneo Osumi, Kenji Motohashi
The 15th International Symposium on Bioscience and Nanotechnology 1 Dec 2017 Bio-nano Electronics Research Centre, Toyo University
We conducted an in-situ mass spectrometry of atoms or molecules scattered on glass surfaces covered with ferrocene in the presence of energetic Xe or C60 fullerene ions to investigate their inelastic processes involving rearrangement or encapsulat...
The 8th International Symposiumu on Surface Science 23 Oct 2017 The Surface Science Society of Japan
We performed a mass-spectrometric study of cluster ions scattered on solid surfaces covered with ferrocene molecules in the presence of 4.8keV‒C60q+ (q = 1 and 2) ions to investigate their encapsulation process. This study aims to develop a novel ...
Spectroscopic studies on atomic excited state formation in sputtering induced by ion-beam bombardment on tungsten surfaces
D. Kato, H.A. Sakaue, Y. Sakai, T. Kenmotsu, k. Furuya, M. Sakamoto and K. Motohashi
16th International Conference on Plasma-Facing Materials and Components for Fusion Applications 16 May 2017 Institute of Energy and Climate Research
Excited state formations in sputtered tungsten atoms by 35-60 keV Kr+ ion-beam bombardment on polycrystalline tungsten are investigated based on emission lines of the atoms in excited states above the surface. Mean velocities of the excited atoms ...
Mass analyses of clusters exit from ion channels covered with ferrocene in incidence of C60 ions
T. Tachikawa, T. Uchida, and K. Motohashi
The 64th JSAP Spring Meeting, 2017 16 Mar 2017 The Japan Society of Applied Physics
Transmission properties of low energy multicharge ion beam entering the gap between a pair of optical lenses
Syu Ishii, Yukihito Mase, Kenji Motohashi
The 64th JSPS Spring meeting, 2017 15 Mar 2017 The Japan Society of Applied Physics
Influence of atmospheric pressure helium plasma irradiation on skin cancer cells and esophageal cancer cells
The 64th JSAP Spring Meeting, 2017 14 Mar 2017 The Japan Society of Applied Physics
The energy distributions of 4MeV-Cq+ ions (q=1,4) guided by a cylindrical glass channel
K. Motohashi, Y. Saito, N. Miyawaki, and K. Narumi
The 1st QST Takasaki Laboratory Symposium 26 Jan 2017 National Institutes for Quantum and Radiological Science and Technology
Transmission propertiies of low energy multi-charge ion beam entering the gap between a pair of optical lenses
Kenji Motohashi
The Annual Meeting of The Atomic Collision Society 11 Dec 2016 The Atomic Collision Society
When Ar3+ ion beam entered the gap between a pair of cylindrical glass lenses and the gap between a pair of flat aluminum optical mirrors, we measured the charge state, energy, and the observation angle of the transmitted ions. We found the guidin...
Development of a atomospheric pressure plasma reaction analizer and the preliminaly results
Yusuke Ueno, Ko-ichirou Hirasawa and Kenji Motohashi
The 41th Annual Meeting of The Atomic Collision Society 11 Dec 2016 The Atomic Collision Society
We have been developing an analizer of plasma induced reaction of living cancer cells. Preliminary results of optical emission spectra, pH, and electric conductivity were measured during the atomospheric plasma irradiation on the esophagus cancer ...
Space distribution and polarizability of optical emission on the surface irradiated with ions
H. A. Sakaue, D. kato, I. Murakami, S. Mineta, K. Lee, Y. Sakai, K. Furuya, T. Kenmotsu, K. Motohashi
The 41th Annual Meeting of The Atomic Collision Society of Japan 10 Dec 2016 The Atomic Collision Society of Japan
We observed optical spectra of Balmer series emitted from hydrogen atoms scattered on a tungsten surface in incidence of 35 keV-proton beam. The spacial distributions of emission intensity and polarizability of the Balmer alpha line spectrum were ...
C60 ion scattering on a thiol self assembled monolayer surface terminated with ferrocene
Kenji Motohashi, Tomoki Tachikawa, and Takashi Uchida
The 41th Annual Meeting of the Atomic Collision Society of Japan 10 Dec 2016 The Atomic Collision Society of Japan
We conducted mass spectroscopy of molecules scattered on solid surfaces covered with ferrocene molecules in the presence of energetic C60 fullerene ions to investigate their encapsulation process. We successfully measured the charge-state-specific...
Mas spectroscopy of fullerene ions scattered on glass surfaces covered with ferrocene molecules
Kenji Motohashi, Tomoki Tachikawa, and Takashi Uchida
The 14th International Symposium on Bioscience and Nanotechnology 24 Nov 2016 Bio-Nano Electronics Research Center
We conducted mass spectroscopy of molecules scattered on solid surfaces covered with ferrocene molecules in the presence of energetic C60 fullerene ions to investigate their encapsulation process. It is expected that Fe@C60 molecular ions exit a c...
4.8keV-C60 ion scattering II on a ferrocene terminated thiol self assembled monolayer surface
Kenji Motohashi
2016 Autumn Meeting of the Physical Society of Japan 14 Sep 2016 The Physical Society of Japan
We conducted mass spectroscopy of molecules scattered on solid surfaces covered with ferrocene molecules in the presence of energetic C60 fullerene ions to investigate their encapsulation process. It is expected that Fe@C60 molecular ions exit a t...
Sputtering with slow highly charged ions under glancing incidence
The 8th Asian International Seminar on Atomic and Molecular Physics 2008
Fragmentation and desorption in low-energy highly charged ion collisions with molecules and surfaces
14th International Conference on the Physics of Highly Charged Ions 2008
Optical emission spectroscopy of excited atoms sputtered on a Ti surface under irradiation with multicharge Ar ions
The 14th International Conference on the Physics of Highly Charged Ions 2008
Secondary-ion emission from GaN(0001) and dodecanethiol/Au(111) surfaces irradiated with Arq+ (q=3-6) at glancing angle
The 14th International Conference on the Physics of Highly Charged ions 2008
Surface chemical analysis by multicharge-ion induced desorption
The 10th Asia Pacific Physics Conference 2007
Secondary ion emission in grazing collisions between highly-charged ions and surfaces -Coincidence experiments with scattered particles-
7th Asian International Seminar on Atomic and Molecular Physics 2006
Analyses of compound-semiconductor surfaces by highly-charged ions
The University of Tokyo International Sympojium and the tenth ISSP International Sympojium on Nanoscience at Surfaces 2006
Momentum-imaging spectroscopy of secondary ions from GaN and SiC surfaces collided with highly-charged ions at grazing angle
15th International Workshop on Inelastic Ion - Surface Collisions 2004
