Rchr
J-GLOBAL ID：200901043393546904
Update date: Mar. 15, 2024
Yokoyama Keiichi
ヨコヤマ ケイイチ | Yokoyama Keiichi
Affiliation and department：
Research field (1)：
Semiconductors, optical and atomic physics
Research keywords (1)：
量子制御
Research theme for competitive and other funds (6)：
- 2022 - 2025 量子ウォークによる同位体分離の原理的研究
- 2022 - 2025 Multiphoton Excitation Phenomena for Trans-Plutonium Elements and Challenge to Separation for Waste Zero-Emission
- 2015 - 2020 Study on isotope separation based on quantum diffusion
- 2008 - 2012 Study on intra-molecular cascade isotope separation
- 2003 - 2003 中赤外フェムト秒パルスの波形整形と量子制御への応用
- 2001 - レーザー同位体分離
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Papers (104)：
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Shohei Matsuda, Nobuaki Nakashima, Keiichi Yokoyama, Seiji Taniguchi, Haik Chosrowjan, Toshihiro Somekawa, Tomoyuki Yatsuhashi. Laser-fluence dependence of resonance-enhanced multiphoton reduction of trivalent europium. Chemical Physics Letters. 2022. 802. 139759-139759
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Akiko Yamaguchi, Kojiro Nagata, Keita Kobayashi, Kazuya Tanaka, Tohru Kobayashi, Hajime Tanida, Kojiro Shimojo, Tetsuhiro Sekiguchi, Yui Kaneta, Shohei Matsuda, et al. Extended X-ray absorption fine structure spectroscopy measurements and ab initio molecular dynamics simulations reveal the hydration structure of the radium(II) ion. iScience. 2022. 25. 8. 104763-104763
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Sekiguchi Tetsuhiro, Yokoyama Keiichi, Yaita Tsuyoshi. Annealing effect of absorbing property for Cs and CsI in fullerene investigated by synchrotron X-ray photoelectron spectroscopy. e-Journal of Surface Science and Nanotechnology (Internet). 2022. 20. 3. 186-195
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Shimojo Kojiro, Fujiwara Iori*, Oshima Tatsuya*, Yokoyama Keiichi, Yaita Tsuyoshi. Lanthanide extraction using a thiodiglycolamic acid extractant; Effect of S-donor on lanthanide separation. Analytical Sciences. 2022. 38. 7. 1003-1006
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Shohei Matsuda, Keiichi Yokoyama, Tsuyoshi Yaita, Tohru Kobayashi, Yui Kaneta, Marie Simonnet, Tetsuhiro Sekiguchi, Mitsunori Honda, Kojiro Shimojo, Reisuke Doi, et al. Marking actinides for separation: Resonance-enhanced multiphoton charge transfer in actinide complexes. Science Advances. 2022. 8. 20
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MISC (23)：
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Yamaguchi Akiko, Nagata Kojiro*, Tanaka Kazuya, Kobayashi Keita, Kobayashi Toru, Shimojo Kojiro, Tanida Hajime, Sekiguchi Tetsuhiro, Kaneta Yui, Matsuda Shohei, et al. Investigation of hydration and adsorption structures on clay minerals of radium by EXAFS. Hosha Kagaku. 2022. 45. 28-30
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Yamaguchi Akiko, Nagata Kojiro, Tanaka Kazuya, Kobayashi Keita, Okumura Masahiko, Kobayashi Tohru, Shimojo Kojiro, Tanida Hajime, Sekiguchi Tetsuhiro, Kaneta Yui, et al. Investigation of hydration and adsorption structures on clay minerals of radium. Abstracts of Annual Meeting of the Geochemical Society of Japan. 2021. 68. 101
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Yokoyama Keiichi, Matsuoka Leo*. Isotope separation based on quantum walk. Ryoshi Woku No Shin Tenkai; Suri Kozo No Shinka To Oyo. 2019. 228-242
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横山 啓一, 松岡 雷士. Optical Frequency Comb Opens up Highly Efficient Isotope Separation of Long-lived Fission Products : The quantum walk to reduce radioactive waste. Atomoσ : journal of the Atomic Energy Society of Japan = アトモス : 日本原子力学会誌. 2014. 56. 8. 525-528
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Matsuoka Leo, Ichihara Akira, Hashimoto Masashi, Yokoyama Keiichi. Theoretical study for laser isotope separation of heavy-element molecules in a thermal distribution. Proceedings of International Conference on Toward and Over the Fukushima Daiichi Accident (GLOBAL 2011) (CD-ROM). 2011. 7
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Patents (6)：
Lectures and oral presentations (108)：
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Solvent extraction of technetium(VII) and rhenium(VII) using amide-type extractants
(第41回溶媒抽出討論会)
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Local structural analysis of Ra-226 adsorbed on hydroxyapatite formed by osteoblast culture
(日本放射化学会第66回討論会(2022))
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Effect of the counterion on the selectivity of lanthanides by 1,10-phenanthroline carboxamide derivatives
(International Solvent Extraction Conference 2022 (ISEC 2022))
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Extraction equilibrium and structural chemistry of rare earths with a nitriloacetic acid diamide-type ligand
(化学工学会第87年会)
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Structural disruption of cesium adsorption sites in clay minerals and their ion desorption using wet ball milling method
(日本原子力学会2022年春の年会)
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Professional career (1)：
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