Akira Kouchi

Chiral Spinodal-like Ordering of Homoimmiscible Water at Interface between Water and Chiral Ice III

Hiromasa Niinomi, Tomoya Yamazaki, Hiroki Nada, Tetsuya Hama, Akira Kouchi, Tomoya Oshikiri, Masaru Nakagawa, Yuki Kimura

The Journal of Physical Chemistry Letters, 659-664, Jan 11, 2024

In situ cryogenic transmission electron microscopy observation on the formation of hydrogen-ordered hexagonal ices and its astrophysical implications

Tomoya Yamazaki, Akira Kouchi, Ken-ichiro Murata, Hiroyasu Katsuno, Hiroki Nada, Tetsuya Hama, Yuki Kimura

Monthly Notices of the Royal Astronomical Society, Nov 6, 2023

Anisotropy in spinodal-like dynamics of unknown water at ice V–water interface

Hiromasa Niinomi, Tomoya Yamazaki, Hiroki Nada, Tetsuya Hama, Akira Kouchi, Tomoya Oshikiri, Masaru Nakagawa, Yuki Kimura

Scientific Reports, 13(1), Oct 11, 2023

Observation of hydrogen-ordered cubic ice thin films on the surface of ice Ic nanocrystals upon coarsening

Akira Kouchi, Tomoya Yamazaki, Hiroyasu Katsuno, Hiroki Nada, Tetsuya Hama, Yuki Kimura

Chemical Physics, 572 111966-111966, Aug, 2023

Surface Reaction of Methyl Mercaptan (CH3SH) with Hydrogen Atoms on Amorphous Solid Water

Thanh Nguyen, Yasuhiro Oba, W. M. C. Sameera, Kenji Furuya, Akira Kouchi, Naoki Watanabe

The Astrophysical Journal, Feb 1, 2023 Peer-reviewed

DESHIMA 2.0: Development of an Integrated Superconducting Spectrometer for Science-Grade Astronomical Observations

Akio Taniguchi, Tom J. L. C. Bakx, Jochem J. A. Baselmans, Robert Huiting, Kenichi Karatsu, Nuria Llombart, Matus Rybak, Tatsuya Takekoshi, Yoichi Tamura, Hiroki Akamatsu …

Journal of Low Temperature Physics, 209(3-4) 278-286, Nov, 2022 Peer-reviewed

Growth Kinetics of Elementary Spiral Steps on Ice Prism Faces Grown in Vapor and Their Temperature Dependence

Genki Miyamoto, Akira Kouchi, Ken-ichiro Murata, Ken Nagashima, Gen Sazaki

CRYSTAL GROWTH & DESIGN, Oct, 2022

Chiral Ice Crystals in Space

Akira Kouchi, Takashi Shimonishi, Tomoya Yamazaki, Masashi Tsuge, Naoki Nakatani, Kenji Furuya, Hiromasa Niinomi, Yasuhiro Oba, Tetsuya Hama, Hiroyasu Katsuno …

Chirality - New Insights [Working Title], Aug 22, 2022

Material Properties of a Low Contraction and Resistivity Silicon–Aluminum Composite for Cryogenic Detectors

Tatsuya Takekoshi, Kianhong Lee, Kah Wuy Chin, Shinsuke Uno, Toyo Naganuma, Shuhei Inoue, Yuka Niwa, Kazuyuki Fujita, Akira Kouchi, Shunichi Nakatsubo …

Journal of Low Temperature Physics, Jul 14, 2022

Diffusion Activation Energy and Desorption Activation Energy for Astrochemically Relevant Species on Water Ice Show No Clear Relation

Kenji Furuya, Tetsuya Hama, Yasuhiro Oba, Akira Kouchi, Naoki Watanabe, Yuri Aikawa

The Astrophysical Journal Letters, Jul 1, 2022

Penetration of Nonenergetic Hydrogen Atoms into Amorphous Solid Water and their Reaction with Embedded Benzene and Naphthalene

Masashi Tsuge, Akira Kouchi, Naoki Watanabe

The Astrophysical Journal, 933(2) 138-138, Jul 1, 2022

UV-Induced Formation of Ice XI Observed Using an Ultra-High Vacuum Cryogenic Transmission Electron Microscope and its Implications for Planetary Science

Akira Kouchi, Yuki Kimura, Kensei Kitajima, Hiroyasu Katsuno, Hiroshi Hidaka, Yasuhiro Oba, Masashi Tsuge, Tomoya Yamazaki, Kazuyuki Fujita, Tetsuya Hama …

Frontiers in Chemistry, 9, Dec 8, 2021

Successive H-atom Addition to Solid OCS on Compact Amorphous Solid Water

Thanh Nguyen, Yasuhiro Oba, W. M. C. Sameera, Akira Kouchi, Naoki Watanabe

The Astrophysical Journal, Dec 1, 2021 Peer-reviewed

Measurements of Ortho-to-para Nuclear Spin Conversion of H2 on Low-temperature Carbonaceous Grain Analogs: Diamond-like Carbon and Graphite

Masashi Tsuge, Akira Kouchi, Naoki Watanabe

The Astrophysical Journal, 923(1) 71-71, Dec 1, 2021

Efficient Formation Pathway of Methyl Formate: The Role of OH Radicals on Ice Dust

A. Ishibashi, H. Hidaka, Y. Oba, A. Kouchi, N. Watanabe

The Astrophysical Journal Letters, Nov 1, 2021 Peer-reviewed

Experimental and Computational Studies on the Physicochemical Behavior of Phosphine Induced by Reactions with H and D Atoms on Interstellar Ice Grains

Thanh Nguyen, Yasuhiro Oba, W. M. C. Sameera, Akira Kouchi, Naoki Watanabe

ASTROPHYSICAL JOURNAL, 918(2), Sep, 2021

Transmission Electron Microscopy Study of the Morphology of Ices Composed of H2O, CO2, and CO on Refractory Grains

Akira Kouchi, Masashi Tsuge, Tetsuya Hama, Yasuhiro Oba, Satoshi Okuzumi, Sin-iti Sirono, Munetake Momose, Naoki Nakatani, Kenji Furuya, Takashi Shimonishi …

The Astrophysical Journal, 918(2) 45-45, Sep 1, 2021

Formation of chiral CO polyhedral crystals on icy interstellar grains

Akira Kouchi, Masashi Tsuge, Tetsuya Hama, Hiromasa Niinomi, Naoki Nakatani, Takashi Shimonishi, Yasuhiro Oba, Yuki Kimura, Sin-iti Sirono, Satoshi Okuzumi …

Monthly Notices of the Royal Astronomical Society, 505(1) 1530-1542, Jun 3, 2021

Rapid Ortho-to-para Nuclear Spin Conversion of H2 on a Silicate Dust Surface

M. Tsuge, T. Namiyoshi, K. Furuya, T. Yamazaki, A. Kouchi, N. Watanabe

The Astrophysical Journal, 908(2) 234-234, Feb 1, 2021

Delivery of Electrons by Proton-Hole Transfer in Ice at 10 K: Role of Surface OH Radicals

Kensei Kitajima, Yoichi Nakai, W. M. C. Sameera, Masashi Tsuge, Ayane Miyazaki, Hiroshi Hidaka, Akira Kouchi, Naoki Watanabe

The Journal of Physical Chemistry Letters, 12(1) 704-710, Jan 14, 2021

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