Ito Kenji

Affiliation and department：

Research field (1)： Structural and functional materials

Research theme for competitive and other funds (8)：

2019 - 2022 Positronium generation, condensation, and cooling to realize Bose-Einstein condensation of antimatter system
2018 - 2022 Development of novel SiO2-based membranes and their application to catalytic membrane reactors for process intensification
2016 - 2019 Developing an elucidation method for surface chemistry on subnanoscaled holes of functional thin films by positronium annihilation
2017 - 2019 DSPによる陽電子寿命測定システムの高度化
2015 - 2018 Nanotuning of silica-based membranes with thin-film processing

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Papers (141)：

K Shu, Y Tajima, R Uozumi, N Miyamoto, S Shiraishi, T Kobayashi, A Ishida, K Yamada, R W Gladen, T Namba, et al. Cooling positronium to ultralow velocities with a chirped laser pulse train. Nature. 2024. 633. 8031. 793-797
Hiroki Yamamoto, Mineyuki Hattori, Kenji Ito, Masahiro Shikano, Kazuki Yoshii. Fluoride-Based Deep Eutectic Solvents with Amide Dual-Hydrogen-Bond Donors. The Journal of Physical Chemistry Letters. 2024. 15. 24. 6249-6255
Kenji Shu, Kyohei Yamada, Kaori Hashidate, Akira Ishida, Toshio Namba, Shoji Asai, Makoto Kuwata-Gonokami, Yohei Tajima, Eunmi Chae, Kosuke Yoshioka, et al. Development of a porous silica cavity for laser excitation of confined positronium. JJAP Conference Proceedings. 2023. 9. 011202-011202
Kenji Shu, Akira Ishida, Toshio Namba, Shoji Asai, Nagayasu Oshima, Brian E. O'Rourke, Kenji Ito. Observation of orthopositronium thermalization in silica aerogel at cryogenic temperatures. Physical Review A. 2021. 104. 5
Zhe Liu, Yawei Zhou, Yunjie Ping, Libing Qian, Jingjing Li, Lei Liu, Yong Liu, Kenji Ito, Changwei Wei, Chunqing He. Enhancement in photoelectric properties of ITO films by regulating defects and dopants with supercritical fluid treatment. Applied Surface Science. 2021. 565. 150551-150551

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MISC (235)：

石田明, 難波俊雄, 浅井祥仁, 田島陽平, 小林拓豊, 魚住亮介, 周健治, 吉岡孝高, 大島永康, O’ROURKE Brian E., et al. Development of nanomaterials for positronium formation aiming at Bose-Einstein condensation. アイソトープ・放射線研究発表会(Web). 2023. 60th
周健治, 田島陽平, 魚住亮介, 宮本尚樹, 白石蒼馬, 小林拓豊, 山田恭平, GLADEN Randall W., 難波俊雄, 浅井祥仁, et al. Laser cooling of positronium using a chirped train of optical pulses. 日本物理学会講演概要集(CD-ROM). 2023. 78. 2
石田明, 難波俊雄, 浅井祥仁, 五神真, 田島陽平, 小林拓豊, 魚住亮介, 周健治, CHAE E., 吉岡孝高, et al. Cooling of positronium for realizing Bose-Einstein condensation. 日本物理学会講演概要集(CD-ROM). 2022. 77. 1
小林拓豊, 田島陽平, 魚住亮介, CHAE E., 石田明, 難波俊雄, 浅井祥仁, 五神真, 大島永康, O’ROURKE B. E., et al. Experimental demonstration of Doppler spectroscopy for observation of laser-cooled positronium. 日本物理学会講演概要集(CD-ROM). 2022. 77. 1
石田明, 橋立佳央理, 難波俊雄, 浅井祥仁, 五神真, 田島陽平, 小林拓豊, 魚住亮介, 周健治, CHAE Eunmi, et al. Laser cooling of positronium in vacuum. KEK Progress Report (Web). 2022. 2022-5

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Patents (6)：

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Books (8)：

陽電子科学 : 基礎から応用まで
日本陽電子科学会 2021
「低エネルギー陽電子による薄膜材料のナノ空隙構造解析」(PCP/MOFおよび各種多孔質材料の作り方、使い方、評価解析)
技術情報協会 2019 ISBN:9784861047695
「低速陽電子消滅法による膜材料のサブナノ空隙サイズ・形状評価」(吸着・分離材料の設計、性能評価と新しい応用)
技術情報協会 2015 ISBN:9784861045974
「陽電子消滅寿命測定法による多孔質材料の構造評価」(粉粒体/多孔質材料の計測とデータの解釈/使い方)
S&T出版 2015 ISBN:9784907002459
「陽電子寿命法による逆浸透膜(RO膜)のサブナノ空隙評価」(造水技術ハンドブック<追補版>)
一般財団法人造水促進センター 2014

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Lectures and oral presentations (24)：

Experimental progress towards positronium Bose-Einstein condensation
(4th Japan-China Joint Workshop on Positron Science 2019)
Time-elapsed change in the subnanoporosity for silica thin films elucidated by the slow positron lifetime technique and ellipsometric porosimetry
(4th Japan-China Joint Workshop on Positron Science 2019)
Na-22 based low-energy AMOC measurements for chemical analysis of the free-volume holes in hydrocarbon-silica hybrid thin films
(15th International Workshop on Slow Positron Beam Techniques and Applications 2019)
Slow positron beam and related research at AIST -Recent developments and future plans-
(18th International Conference on Positron Annihilation 2018)
Nanoporosity and surface chemistry of siloxane-silica thin films elucidated by low-energy PALS and AMOC
(18th International Conference on Positron Annihilation 2018)

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Professional career (1)：

Work history (10)：

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