Yoshihiro Okamoto - My portal

Profile Information

Affiliation: Japan Atomic Energy Agency

J-GLOBAL ID: 202101009401975528
researchmap Member ID: R000017311

Research Areas

Energy / Quantum beam science /

Papers

Neutron resonance absorption imaging of simulated high-level radioactive waste in borosilicate glass

Oba Yojiro, Motokawa Ryuhei, Kaneko Koji, Nagai Takayuki, Tsuchikawa Yusuke, Shinohara Takenao, Parker J. D.*, Okamoto Yoshihiro

Scientific Reports (Internet), 13 10071\_1-10071\_8, Jun, 2023 Peer-reviewed
Structural change by phosphorus addition to borosilicate glass containing simulated waste components

Okamoto Yoshihiro, Shiwaku Hideaki, Shimamura Keisuke*, Kobayashi Hidekazu, Nagai Takayuki, Inose Takehiko*, Sato Seiichi*, Hatakeyama Kiyoshi*

Journal of Nuclear Materials, 570 153962\_1-153962\_13, Nov, 2022 Peer-reviewed
Structure and magnetic properties of Fe nanoparticles in amorphous silica implanted with Fe ions and effect of subsequent energetic heavy ion irradiation

Iwase Akihiro*, Fukuda Kengo*, Saito Yuichi*, Okamoto Yoshihiro, Semboshi Satoshi*, Amekura Hiroshi*, Matsui Toshiyuki*

Journal of Applied Physics, 132(16) 163902\_1-163902\_10, Oct, 2022 Peer-reviewed
Study on the relation between the crystal structure and thermal stability of FeUO$_{4}$ and CrUO$_{4}$

Akiyama Daisuke*, Kusaka Ryoji, Kumagai Yuta, Nakada Masami, Watanabe Masayuki, Okamoto Yoshihiro, Nagai Takayuki, Sato Nobuaki*, Kirishima Akira*

Journal of Nuclear Materials, 568 153847\_1-153847\_10, Sep, 2022 Peer-reviewed
Deep groundwater physicochemical components affecting actinide migration

Kirishima Akira*, Terasaki Mariko*, Miyakawa Kazuya, Okamoto Yoshihiro, Akiyama Daisuke*

Chemosphere, 289 133181\_1-133181\_12, Apr, 2022 Peer-reviewed
Nanoscopic structure of borosilicate glass with additives for nuclear waste vitrification

Motokawa Ryuhei, Kaneko Koji, Oba Yojiro, Nagai Takayuki, Okamoto Yoshihiro, Kobayashi Taishi*, Kumada Takayuki, Heller W. T.*

Journal of Non-Crystalline Solids, 578 121352\_1-121352\_7, Feb, 2022 Peer-reviewed
EXAFS studies for atomic structural change induced by ion irradiation of a reactor pressure vessel steel

Iwata Keiko, Takamizawa Hisashi, Ha Yoosung, Shimodaira Masaki, Okamoto Yoshihiro, Honda Mitsunori, Katsuyama Jinya, Nishiyama Yutaka

Nuclear Instruments and Methods in Physics Research B, 511 143-152, Jan, 2022 Peer-reviewed
Crystal structure of U$_{1-y}$Ln$_{y}$O$_{2-x}$ (Ln = Gd, Er) solid solution

Pham V. M.*, Arima Tatsumi*, Inagaki Yaohiro*, Idemitsu Kazuya*, Akiyama Daisuke*, Nagai Takayuki, Okamoto Yoshihiro

Journal of Nuclear Materials, 556 153189\_1-153189\_9, Dec, 2021 Peer-reviewed
Development of fluorescence XAFS imaging using pinhole camera

Tanida Hajime, Okamoto Yoshihiro

Advances in X-Ray Chemical Analysis, Japan, 52, 69-80, Mar, 2021 Peer-reviewed
XAFS analysis of ruthenium in simulated iron phosphate radioactive waste glass

Okamoto Yoshihiro, Kobayashi Hidekazu, Shiwaku Hideaki, Sasage Kenichi, Hatakeyama Kiyoshi*, Nagai Takayuki

Journal of Non-Crystalline Solids, 551 120393\_1-120393\_8, Jan, 2021 Peer-reviewed
Chemical state analysis of simulated corium debris by EXAFS

Okamoto Yoshihiro, Takano Masahide

Progress in Nuclear Science and Technology (Internet), 5 200-203, Nov, 2018 Peer-reviewed
Chemical state analysis of rhodium in simulated waste glass by synchrotron-radiation-based XAFS and imaging XAFS techniques

Okamoto Yoshihiro, Nagai Takayuki, Shiwaku Hideaki, Inose Takehiko*, Sato Seiichi*

Nihon Genshiryoku Gakkai Wabun Rombunshi, 16(4) 180-190, Dec, 2017 Peer-reviewed
The Significance of bromide in the Brust-Schiffrin synthesis of thiol protected gold nanoparticles

Booth S. G.*, Uehara Akihiro*, Chang S.-Y.*, La Fontaine C.*, Fujii Toshiyuki*, Okamoto Yoshihiro, Imai Takahito*, Schroeder S. L. M.*, Dryfe R. A. W.*

Chemical Science, 8(12) 7954-7962, Dec, 2017 Peer-reviewed
Ion species/energy dependence of irradiation-induced lattice structure transformation and surface hardness of Ni$_{3}$Nb and Ni$_{3}$Ta intermetallic compounds

Kojima Hiroshi*, Kaneno Yasuyuki*, Ochi Masaaki*, Semboshi Satoshi*, Hori Fuminobu*, Saito Yuichi*, Ishikawa Norito, Okamoto Yoshihiro, Iwase Akihiro*

Materials Transactions, 58(5) 739-748, May, 2017 Peer-reviewed
Local structure analysis of ZrN, and Dy$_{0.5}$Zy$_{0.5}$N surrogate materials for fast reactor nitride fuel

Yoneda Yasuhiro, Tsuji Takuya, Matsumura Daiju, Okamoto Yoshihiro, Takaki Seiya, Takano Masahide

Transactions of the Materials Research Society of Japan, 42(2) 23-26, Apr, 2017 Peer-reviewed
Chemical state analysis of high-temperature molten slag components by using high-energy XAFS

Okamoto Yoshihiro, Osugi Takeshi, Akabori Mitsuo, Kobayashi Toru, Shiwaku Hideaki

Journal of Molecular Liquids, 232 285-289, Apr, 2017 Peer-reviewed
Radiation enhanced precipitation of solute atoms in AlCu binary alloys; Energetic ion irradiation experiment and computer simulation

Mayumi Ren*, Semboshi Satoshi*, Okamoto Yoshihiro, Saito Yuichi*, Yoshiie Toshimasa*, Iwase Akihiro*

Transactions of the Materials Research Society of Japan, 42(1) 9-14, Feb, 2017 Peer-reviewed
Mechanism of Cs removal from Fukushima weathered biotite by heat treatment with a NaCl-CaCl$_{2}$ mixed salt

Honda Mitsunori, Okamoto Yoshihiro, Shimoyama Iwao, Shiwaku Hideaki, Suzuki Shinichi, Yaita Tsuyoshi

ACS Omega (Internet), 2(2) 721-727, Feb, 2017 Peer-reviewed
Desorption behavior of Cs from clay minerals by thermal heating in a vacuum; Analyses by thermal desorption spectroscopy and synchrotron radiation X-ray photoelectron spectroscopy

Hirao Norie, Shimoyama Iwao, Baba Yuji, Izumi Toshinori, Okamoto Yoshihiro, Yaita Tsuyoshi, Suzuki Shinichi

Bunseki Kagaku, 65(5) 259-266, May, 2016 Peer-reviewed
Lattice structure transformation and change in surface hardness of Ni$_3$Nb and Ni$_3$Ta intermetallic compounds induced by energetic ion beam irradiation

Kojima Hiroshi*, Yoshizaki Hiroaki*, Kaneno Yasuyuki*, Semboshi Satoshi*, Hori Fuminobu*, Saito Yuichi, Okamoto Yoshihiro, Iwase Akihiro*

Nuclear Instruments and Methods in Physics Research B, 372 72-77, Apr, 2016 Peer-reviewed

Misc.

Structural investigation of borosilicate glasses by using XAFS measurement in soft X-ray region, 3 (Joint research)

Nagai Takayuki, Okamoto Yoshihiro, Yamagishi Hirona*, Shibata Daisuke*, Kojima Kazuo*, Hasegawa Takehiko*, Sato Seiichi*, Fukaya Akane*, Hatakeyama Kiyoshi*

JAEA-Research 2023-004, 45, Sep, 2023
Synchrotron analysis of simulated waste glasses different in boron isotope ingredient

Nagai Takayuki, Tone Masaya, Katsuoka Nanako, Okamoto Yoshihiro, Baba Yuji*, Akiyama Daisuke*

Photon Factory Activity Report 2022 (Internet), 3, Jan, 2023
Structural investigation of borosilicate glasses by using XAFS measurement in soft X-ray region, 2 (Joint research)

Nagai Takayuki, Okamoto Yoshihiro, Yamagishi Hirona*, Kojima Kazuo*, Inose Takehiko*, Sato Seiichi*, Hatakeyama Kiyoshi*

JAEA-Research 2022-008, 37, Oct, 2022
Synchrotron analysis of simulated waste glasses different in boron isotope ingredient

Nagai Takayuki, Okamoto Yoshihiro, Baba Yuji*, Akiyama Daisuke*, Arima Tatsumi*

Photon Factory Activity Report 2021 (Internet), 2, Jan, 2022
Structural investigation of borosilicate glasses by using XAFS measurement in Soft X-ray region (Joint research)

Nagai Takayuki, Okamoto Yoshihiro, Yamagishi Hirona*, Ota Toshiaki*, Kojima Kazuo*, Inose Takehiko*, Sato Seiichi*, Hatakeyama Kiyoshi*

JAEA-Research 2021-010, 62, Jan, 2022
Transfer behavior of cesium adsorbed on clay minerals in aqueous solution

Okamoto Yoshihiro, Osugi Takeshi, Shiwaku Hideaki, Akabori Mitsuo*

Insights Concerning the Fukushima Daiichi Nuclear Accident, Vol.4; Endeavors by Scientists, 285-294, Oct, 2021
Investigation of chemical state of uranium included in simulated waste glass

Nagai Takayuki, Akiyama Daisuke*, Kirishima Akira*, Sato Nobuaki*, Okamoto Yoshihiro

2019-Nendo "Busshitsu, Debaisu Ryoiki Kyodo Kenkyu Kyoten" Oyobi "Hito, Kankyo To Busshitsu O Tsunagu Inobeshion Soshutsu Dainamikku, Araiansu" Kenkyu Seika, Katsudo Hokokusho (CD-ROM), -20191107\_1, Nov, 2020
Structural investigation of simulated waste glass samples by using XAFS measurement in soft X-ray region (Joint research)

Nagai Takayuki, Okamoto Yoshihiro, Yamagishi Hirona*, Ota Toshiaki*, Kojima Kazuo*, Inose Takehiko*, Sato Seiichi*, Hatakeyama Kiyoshi*

JAEA-Research 2020-009, 48, Sep, 2020
Structural change of borosilicate glass by boron isotope composition

Nagai Takayuki, Okamoto Yoshihiro, Akiyama Daisuke*, Uehara Akihiro*, Fujii Toshiyuki*, Sekimoto Shun*

KURNS Progress Report 2019, -257, Aug, 2020
Investigation of chemical state of simulated waste glasses by using XAFS measurement

Nagai Takayuki, Shimoyama Iwao, Okamoto Yoshihiro, Akiyama Daisuke*, Arima Tatsumi*

Photon Factory Activity Report 2019 (Internet), 3, Jan, 2020
XAFS measurement of simulated waste glass samples (Joint research)

Nagai Takayuki, Sasage Kenichi, Okamoto Yoshihiro, Shiwaku Hideaki, Yamagishi Hirona*, Ota Toshiaki*, Inose Takehiko*, Sato Seiichi*, Hatakeyama Kiyoshi*, Takahashi Tomoe* …

JAEA-Research 2019-003, 94, Sep, 2019
Structural change of borosilicate glass by neutron irradiation

Nagai Takayuki, Kobayashi Hidekazu, Okamoto Yoshihiro, Akiyama Daisuke*, Sato Nobuaki*, Uehara Akihiro*, Fujii Toshiyuki*, Sekimoto Shun*

KURNS Progress Report 2018, -105, Aug, 2019
Investigation of chemical state of uranium included in simulated waste glass

Nagai Takayuki, Akiyama Daisuke*, Sato Nobuaki*, Okamoto Yoshihiro

"Busshitsu, Debaisu Ryoiki Kyodo Kenkyu Kyoten" Oyobi "Hito, Kankyo To Busshitsu O Tsunagu Inobeshion Soshutsu Danamikku, Araiansu" Kenkyu Seika, Katsudo Hokokusho (Heisei-30-Nendo) (CD-ROM), -20181080\_1, Jun, 2019
Synchrotron radiation based XAFS analysis of the simulated nuclear waste glass samples prepared by bottom drain test in the full-scale mock-up melter (KMOC) (Contract research)

Okamoto Yoshihiro, Nagai Takayuki, Shiwaku Hideaki, Kano Shigeru, Himeno Haruyuki*, Kobayashi Hiroshi*, Nakatani Mikio*

JAEA-Research 2018-013, 18, Mar, 2019
Evaluation of uranium chemical state in borosilicate glasses by using XAFS measurement

Nagai Takayuki, Okamoto Yoshihiro, Akiyama Daisuke*, Sato Nobuaki*

Photon Factory Activity Report 2018 (Internet), 2, Jan, 2019
Contribution to upgrade of vitrification technology by synchrotron radiation analysis; From Chemical state analysis of waste glass to development of structural analysis to prove soundness

Okamoto Yoshihiro, Nagai Takayuki, Shiwaku Hideaki

Yoyuen Oyobi Koon Kogaku, 62(1) 11-17, Jan, 2019
Investigation of simulated waste glass samples prepared from borosilicate glass frit including vanadium

Nagai Takayuki, Okamoto Yoshihiro, Shiwaku Hideaki, Inose Takehiko*, Sato Seiichi*, Hatakeyama Kiyoshi*, Hirono Kazuya*, Homma Masanobu*, Kobayashi Hiromi*, Takahashi Tomoe* …

JAEA-Research 2018-007, 87, Nov, 2018
XAFS measurement of simulated waste glass samples prepared from borosilicate glass frit including phosphorus pentaoxide (Joint research)

Nagai Takayuki, Kobayashi Hidekazu, Shimamura Keisuke, Oyama Koichi, Sasage Kenichi, Okamoto Yoshihiro, Shiwaku Hideaki, Yamanaka Keisuke*, Ota Toshiaki*

JAEA-Research 2018-005, 72, Sep, 2018
Synchrotron radiation based X-ray absorption study for upgrade of nuclear waste vitrification technique

Okamoto Yoshihiro, Nagai Takayuki, Shiwaku Hideaki

Hoshako, 31(4) 274-280, Jul, 2018
Local structure analysis of light elements included in simulated radioactive waste glasses by soft X-ray absorption fine structure

Okamoto Yoshihiro, Nagai Takayuki, Kaneko Koji, Motokawa Ryuhei, Haga Yoshinori, Yamanaka Keisuke*, Ota Toshiaki*

2017-Nendo Seika Kokaigata Riyo Seika Hokokusho (Ritsumeikan Daigaku SR Senta), 33-36, Jan, 2018

Presentations

209

Basic Research Programs of Vitrification Technology for Waste Volume Reduction, 126-3; Examination of YP formation mechanisms by experiments using zirconium molybdate as a starting material

Okamoto Yoshihiro, Nagai Takayuki, Katsuoka Nanako, Akiyama Daisuke*, Kirishima Akira*

日本原子力学会2024年春の年会
Evaluation of cerium valence on the surface layer and inside of simulated waste glass

Nagai Takayuki, Maeda Yuta, Katsuoka Nanako, Okamoto Yoshihiro, Baba Yuji*, Akiyama Daisuke*

2023年度量子ビームサイエンスフェスタ; 第15回MLFシンポジウム, 第41回PFシンポジウム
Study of simulated fuel debris properties by spectroscopic analysis from micro to bulk range

Endo Ryo*, Akiyama Daisuke*, Yomogida Takumi, Okamoto Yoshihiro, Tanida Hajime, Kirishima Akira*

日本原子力学会2024年春の年会
Micro XAFS/XRF/XRD coincidence measurement of U-Zr-Gd-O mixed oxide samples at the same site

Tanida Hajime, Okamoto Yoshihiro

第37回日本放射光学会年会・放射光科学合同シンポジウム
Attempt of JAEA to the data structuration

Fujikawa Seiji, Okamoto Yoshihiro

2023年度ARIM技術スタッフ集合研修会
Compositional dependence on the local structure of the simulated nuclear waste glass samples

Okamoto Yoshihiro, Masuno Atsunobu*, Owaku Kohei*, Tsukada Takeshi*, Kanehira Norio*

第5回放射性廃棄物固化体討論会
Micro XAFS/XRF/XRD coincidence measurement at the same site

Tanida Hajime, Okamoto Yoshihiro

第26回XAFS討論会
Analysis of U-Zr-Gd-O simulated fuel debris particles using micro XAFS, 2; Evaluation of crystal structure, composition and redox state

Akiyama Daisuke*, Okamoto Yoshihiro, Tanida Hajime, Kirishima Akira*

日本原子力学会2023年秋の大会
Analysis of U-Zr-Gd-O simulated fuel debris particles using micro XAFS, 1; Development of micro XAFS/XRF/XRD simultaneous measurement system

Okamoto Yoshihiro, Akiyama Daisuke*, Kirishima Akira*, Tanida Hajime

日本原子力学会2023年秋の大会
Basic research programs of vitrification technology for waste volume reduction, 118; Examination of YP formation mechanisms by experiments using zirconium molybdate as a starting material, 2

Nagai Takayuki, Katsuoka Nanako, Okamoto Yoshihiro, Akiyama Daisuke*, Kirishima Akira*

日本原子力学会2023年秋の大会
Investigation of chemical state of uranium contained in borosilicate glass

Katsuoka Nanako, Nagai Takayuki, Okamoto Yoshihiro, Inose Takehiko*, Akiyama Daisuke*, Kirishima Akira*, Sato Nobuaki*

日本原子力学会2023年春の年会
Construction of a combined synchrotron radiation based simultaneous X-ray measurement system for simulated waste glass samples

Okamoto Yoshihiro, Tanida Hajime, Nagai Takayuki

第4回放射性廃棄物固化体討論会
Actinide science of JAEA beamline in SPring-8

Okane Tetsuo, Yaita Tsuyoshi, Okamoto Yoshihiro, Yoshii Kenji, Fujimori Shinichi, Tanida Hajime, Takeda Yukiharu, Kobayashi Toru

ATAS-AnXAS 2022 Joint Workshop; 5th International Workshop on Advanced Techniques in Actinide Spectroscopy \& 9th Workshop on Speciation, Techniques and Facilities for Synchrotron Radiation
Chemical analysis of glass samples by imaging XAFS and micro XAFS

Okamoto Yoshihiro, Nagai Takayuki, Tanida Hajime

第54回溶融塩化学討論会
Basic research programs of vitrification technology for waste volume reduction, 102; Micro XAFS analysis of molybdate aggregated in simulated waste glass

Okamoto Yoshihiro, Nagai Takayuki, Sato Seiichi*, Inose Takehiko*, Hatakeyama Kiyoshi*, Tanida Hajime

日本原子力学会2022年秋の大会
Analysis of multi-component heterogeneous samples by micro-XAFS

Tanida Hajime, Okamoto Yoshihiro, Nagai Takayuki

第25回XAFS討論会
Dissolution behavior of iron-uranium oxide

Tonna Ryutaro*, Sasaki Takayuki*, Okamoto Yoshihiro, Kobayashi Taishi*, Akiyama Daisuke*, Kirishima Akira*, Sato Nobuaki*

日本地球惑星科学連合2022年大会(JpGU 2022)
Deep groundwater components affecting actinide migration

Kirishima Akira*, Terasaki Mariko*, Miyakawa Kazuya, Okamoto Yoshihiro, Akiyama Daisuke*

日本地球惑星科学連合2022年大会(JpGU 2022)
Multi-scale structural analysis of simulated nuclear waste glass samples using quantum beams

Okamoto Yoshihiro, Nagai Takayuki, Motokawa Ryuhei, Kaneko Koji, Oba Yojiro, Shobu Takahisa, Tominaga Aki, Tanida Hajime, Matsumura Daiju, Tsuji Takuya, Yoneda Yasuhiro

J-PARC MLF利用者懇談会2021年度液体・非晶質研究会
Nuclear science research activities in BL-27

Okamoto Yoshihiro, Nagai Takayuki, Akiyama Daisuke*, Iwata Keiko, Usami Noriko*

2021年度量子ビームサイエンスフェスタ; 第13回MLFシンポジウム/第39回PFシンポジウム

Research Projects

空間分解能を備えたイメージングXAFSによる異種元素間の化学的相関分析

基盤研究（Ｃ）

岡本芳浩
福島汚染土壌の減容化と再利用に向けたセシウムフリー鉱化法の開発

基盤研究（Ａ）

岡本芳浩
異種元素添加した核燃料模擬材料の高エネルギー重イオン照射効果

基盤研究（Ｂ）

岡本芳浩
放射光イメージング技術による原子力燃料材料の元素分布及び挙動解析

基盤研究（Ｃ）

岡本芳浩
小角散乱法による逆ミセル生成メカニズムの解明と第三相生成制御への展開

基盤研究（Ｃ）

岡本芳浩

Industrial Property Rights

8052947 Method for selective separation of trivalent and tetravalent actinoids from trivalent lanthanoids using hybrid donor type extractant having functional group carrying active oxygen and nitrogen atoms

矢板毅, 塩飽秀啓, 鈴木伸一, 岡本芳浩, not registered
4911538 酸素及び窒素原子が活性な官能基を持つハイブリットドナー型抽出剤による3価及び4価アクチノイドの3価ランタノイドからの選択的分離法

矢板毅, 塩飽秀啓, 鈴木伸一, 岡本芳浩, not registered