The formation of hydrogen molecules by chemisorption of hydrogen atoms on crystalline silicate surface

• Project/Area Number: 21H01143
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 17010:Space and planetary sciences-related
• Research Institution: The University of Tokyo
• Principal Investigator: Hama Tetsuya 東京大学, 大学院総合文化研究科, 准教授 (20579172)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Project Status: Completed (Fiscal Year 2023)
• Budget Amount: ¥17,680,000 (Direct Cost: ¥13,600,000、Indirect Cost: ¥4,080,000); Fiscal Year 2023: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000); Fiscal Year 2022: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000); Fiscal Year 2021: ¥10,140,000 (Direct Cost: ¥7,800,000、Indirect Cost: ¥2,340,000)
• Keywords: 星間塵 / ケイ酸塩鉱物 / 水素原子 / 水素分子 / 化学吸着

Outline of Research at the Start

水素分子（H2）は星間空間で最も存在度が高い分子であり，星間塵表面に水素原子（H）が吸着し再結合することで生成している（H + H → H2）．しかし20 K以上の星間塵表面にはH原子は物理吸着できないため「低密度雲(>20 K)でどのようにしてH2が生成し分子雲(<20 K)へと進化するのか？」は，天体の進化を理解するうえで根源的であるにもかかわらず未解決問題となっている．そこで本研究では「鉱物の星間塵表面にH原子が化学吸着することで20 K以上でもH2が生成する」という仮説を実験的に検証する．

Outline of Final Research Achievements

Molecular hydrogen (H2) is the most abundant molecule in interstellar clouds. In cold interstellar regions below 20 K, H2 is predominantly formed through recombination of two physisorbed hydrogen (H) atoms on dust grains. In warm interstellar regions with dust temperatures higher than 20 K, the importance of chemisorbed H atoms on dust is increased in the H2 formation because physisorbed H atoms no longer exist on the dust grain surfaces. However, our understanding of the H2 formation in warm interstellar regions is still at an early stage, where chemisorption can play a role. In this study, we developed a novel experimental setup to study the chemisorption of H atoms and H2 molecule on silicate, a representative model material for interstellar dust grains, at 70-1000 K.

Academic Significance and Societal Importance of the Research Achievements

水素分子は星間空間で最も豊富に存在し，恒星や惑星の材料物質となる重要な分子である．星間空間において水素分子は，水素原子が星間塵（鉱物でできた微粒子）の表面に吸着し，化学反応をおこすことで生成すると考えられているが，鉱物表面でどのような化学反応がおきているかについてはほとんどわかっていない．本研究では，真空環境で鉱物試料を1000 Kまで加熱することで表面の汚染物質（大気中の有機物など）を除去し，さらに星間空間の温度環境である70 Kまで鉱物試料を冷却し表面反応を調べることができる実験装置を開発した．この装置により鉱物の星間塵における水素分子の生成過程について理解が進むことが期待される．

Research Products

• [Journal Article] Chiral Spinodal-like Ordering of Homoimmiscible Water at Interface between Water and Chiral Ice III (2024)
  • Author(s): Niinomi Hiromasa、Yamazaki Tomoya、Nada Hiroki、Hama Tetsuya、Kouchi Akira、Oshikiri Tomoya、Nakagawa Masaru、Kimura Yuki
  • Journal Title: The Journal of Physical Chemistry Letters Volume: 15 Issue: 2 Pages: 659-664
  • DOI: 10.1021/acs.jpclett.3c03006
  • Peer Reviewed
• [Journal Article] Comparing the radiolytic oxidation of sulfur and chloride within ice on Europa and Mars (2024)
  • Author(s): Tan Shuya、Sekine Yasuhito、Kikuchi Takashi、Suematsu Hisayuki、Hama Tetsuya、Takahashi Yoshio
  • Journal Title: Icarus Volume: 410 Pages: 115873-115873
  • DOI: 10.1016/j.icarus.2023.115873
  • Peer Reviewed / Open Access
• [Journal Article] Structure of crystalline water ice formed through neon matrix sublimation under cryogenic and vacuum conditions (2023)
  • Author(s): Sato Reo、Taniguchi So、Numadate Naoki、Hama Tetsuya
  • Journal Title: The Journal of Chemical Physics Volume: 158 Issue: 21 Pages: 211101-211101
  • DOI: 10.1063/5.0150927
  • Peer Reviewed
• [Journal Article] Observation of hydrogen-ordered cubic ice thin films on the surface of ice Ic nanocrystals upon coarsening (2023)
  • Author(s): Kouchi Akira、Yamazaki Tomoya、Katsuno Hiroyasu、Nada Hiroki、Hama Tetsuya、Kimura Yuki
  • Journal Title: Chemical Physics Volume: 572 Pages: 111966-111966
  • DOI: 10.1016/j.chemphys.2023.111966
  • Peer Reviewed
• [Journal Article] Impurity contribution to ultraviolet absorption of saturated fatty acids (2023)
  • Author(s): Saito Shota、Numadate Naoki、Teraoka Hidemasa、Enami Shinichi、Kobayashi Hirokazu、Hama Tetsuya
  • Journal Title: Science Advances Volume: 9 Issue: 38
  • DOI: 10.1126/sciadv.adj6438
  • Peer Reviewed / Open Access
• [Journal Article] Anisotropy in spinodal-like dynamics of unknown water at ice V water interface (2023)
  • Author(s): Niinomi Hiromasa、Yamazaki Tomoya、Nada Hiroki、Hama Tetsuya、Kouchi Akira、Oshikiri Tomoya、Nakagawa Masaru、Kimura Yuki
  • Journal Title: Scientific Reports Volume: 13 Issue: 1 Pages: 16227-16227
  • DOI: 10.1038/s41598-023-43295-4
  • Peer Reviewed / Open Access
• [Journal Article] <i>In situ</i> cryogenic transmission electron microscopy observation on the formation of hydrogen-ordered hexagonal ices and its astrophysical implications (2023)
  • Author(s): Yamazaki Tomoya、Kouchi Akira、Murata Ken-ichiro、Katsuno Hiroyasu、Nada Hiroki、Hama Tetsuya、Kimura Yuki
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 527 Issue: 2 Pages: 2858-2868
  • DOI: 10.1093/mnras/stad3401
  • Peer Reviewed / Open Access
• [Journal Article] Promotion of glyoxylic acid penetration into human hair by glycolic acid (2023)
  • Author(s): Uyama Makoto、Okabe Shinya、Kurashima Takumi、Kurinobu Rie、Takechi Miwa、Yoshiba Ryo、Miyoshi Rina、Noda Seigi、Kaneko Mio、Ikemoto Yuka、Takahara Atsushi、Higaki Yuji、Hama Tetsuya
  • Journal Title: International Journal of Cosmetic Science Volume: 45 Issue: 2 Pages: 246-254
  • DOI: 10.1111/ics.12838
  • Peer Reviewed
• [Journal Article] Direct Observation and Quantitative Measurement of OH Radical Desorption During the Ultraviolet Photolysis of Liquid Nonanoic Acid (2022)
  • Author(s): Naoki Numadate, Shota Saito, Yuki Nojima, Taka-aki Ishibashi, Shinichi Enami, and Tetsuya Hama
  • Journal Title: The Journal of Physical Chemistry Letters Volume: 13 Issue: 35 Pages: 8290-8297
  • DOI: 10.1021/acs.jpclett.2c02199
  • Peer Reviewed
• [Journal Article] Chiral Ice Crystals in Space (2022)
  • Author(s): Kouchi Akira、Shimonishi Takashi、Yamazaki Tomoya、Tsuge Masashi、Nakatani Naoki、Furuya Kenji、Niinomi Hiromasa、Oba Yasuhiro、Hama Tetsuya、Katsuno Hiroyasu、Watanabe Naoki、Kimura Yuki
  • Journal Title: IntechOpen Volume: -
  • DOI: 10.5772/intechopen.106708
  • ISBN: 9781803550572, 9781803550589
  • Peer Reviewed / Open Access
• [Journal Article] FAUST V. Hot methanol in the [BHB2007] 11 protobinary system; hot corino versus shock origin (2022)
  • Author(s): Vastel C.、Alves F.、Ceccarelli C.、Bouvier M.、Jimenez-Serra I.、Sakai T.、Caselli P.、Evans L.、Fontani F.、Le Gal R.、Chandler C. J.、Svoboda B.、Maud L.、Codella C.、Sakai N.、Lopez-Sepulcre A.、Moellenbrock G.、Hanawa T.、Yamamoto S. et al.
  • Journal Title: Astronomy &amp; Astrophysics Volume: 664 Pages: A171-A171
  • DOI: 10.1051/0004-6361/202243414
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Diffusion Activation Energy and Desorption Activation Energy for Astrochemically Relevant Species on Water Ice Show No Clear Relation (2022)
  • Author(s): Furuya Kenji、Hama Tetsuya、Oba Yasuhiro、Kouchi Akira、Watanabe Naoki、Aikawa Yuri
  • Journal Title: The Astrophysical Journal Letters Volume: 933 Issue: 1 Pages: L16-L16
  • DOI: 10.3847/2041-8213/ac78e9
  • Peer Reviewed / Open Access
• [Journal Article] Chemical and Physical Characterization of the Isolated Protostellar Source CB68: FAUST IV (2022)
  • Author(s): Imai Muneaki、Oya Yoko、Svoboda Brian、Liu Hauyu Baobab、Lefloch Bertrand、Viti Serena、Zhang Yichen、Ceccarelli Cecilia、Codella Claudio、Chandler Claire J.、Sakai Nami ... Nomura Hideko ... Yamamoto Satoshi
  • Journal Title: The Astrophysical Journal Volume: 934 Issue: 1 Pages: 70-70
  • DOI: 10.3847/1538-4357/ac77e7
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Infrared multiple‐angle incidence resolution spectrometry for vapor‐deposited amorphous water (2022)
  • Author(s): Nagasawa Takumi、Numadate Naoki、Hama Tetsuya
  • Journal Title: Journal of Raman Spectroscopy Volume: 53 Issue: 10 Pages: 1748-1772
  • DOI: 10.1002/jrs.6377
  • Peer Reviewed
• [Journal Article] Low- and High-Density Unknown Waters at Ice?Water Interfaces (2022)
  • Author(s): Niinomi Hiromasa、Kouch Akira、Hama Tetsuya、Nada Hiroki、Yamazaki Tomoya、Kimura Yuki
  • Journal Title: The Journal of Physical Chemistry Letters Volume: 13 Issue: 19 Pages: 4251-4256
  • DOI: 10.1021/acs.jpclett.2c00660
  • Peer Reviewed / Open Access
• [Journal Article] Misaligned Rotations of the Envelope, Outflow, and Disks in the Multiple Protostellar System of VLA 1623-2417: FAUST. III (2022)
  • Author(s): Ohashi Satoshi、Codella Claudio、Sakai Nami、et al.
  • Journal Title: The Astrophysical Journal Volume: 927 Issue: 1 Pages: 54-54
  • DOI: 10.3847/1538-4357/ac4cae
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Formation of chiral CO polyhedral crystals on icy interstellar grains (2021)
  • Author(s): Kouchi, A., Tsuge, M., Hama, T., Niinomi, H., Nakatani, N., Shimonishi, T., Oba, Y., Kimura, Y., Sirono, S.-. iti ., Okuzumi, S., Momose, M., Furuya, K., & Watanabe, N.
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 505 Issue: 1 Pages: 1530-1542
  • DOI: 10.1093/mnras/stab1173
  • NAID: 120007132042
  • Peer Reviewed / Open Access
• [Journal Article] Transmission Electron Microscopy Study of the Morphology of Ices Composed of H2O, CO2, and CO on Refractory Grains (2021)
  • Author(s): Kouchi, A., Tsuge, M., Hama, T., Oba, Y., Okuzumi, S., Sirono, S.-. iti ., Momose, M., Nakatani, N., Furuya, K., Shimonishi, T., Yamazaki, T., Hidaka, H., Kimura, Y., Murata, K.-. ichiro ., Fujita, K., Nakatsubo, S., Tachibana, S., & Watanabe, N.
  • Journal Title: The Astrophysical Journal Volume: 918 Issue: 2 Pages: 45-45
  • DOI: 10.3847/1538-4357/ac0ae6
  • Peer Reviewed / Open Access
• [Journal Article] Absolute Absorption Cross Section and Orientation of Dangling OH Bonds in Water Ice (2021)
  • Author(s): Nagasawa Takumi、Sato Reo、Hasegawa Takeshi、Numadate Naoki、Shioya Nobutaka、Shimoaka Takafumi、Hasegawa Takeshi、Hama Tetsuya
  • Journal Title: The Astrophysical Journal Letters Volume: 923 Issue: 1 Pages: L3-L3
  • DOI: 10.3847/2041-8213/ac3a0e
  • Peer Reviewed / Open Access
• [Journal Article] UV-induced formation of ice XI observed using an ultra-high vacuum cryogenic transmission electron microscope and its implications for planetary science (2021)
  • Author(s): Kouchi Akira、Kimura Yuki、Kitajima Kensei、Katsuno Hiroyasu、Hidaka Hiroshi、Oba Yasuhiro、Tsuge Masashi、Yamazaki Tomoya、Fujita Kazuyuki、Hama Tetsuya、Takahashi Yukihiro、Nakatsubo Shunichi、Watanabe Naoki
  • Journal Title: Frontiers in Chemistry Volume: 9 Pages: 799851-799851
  • DOI: 10.3389/fchem.2021.799851
  • Peer Reviewed / Open Access
• [Journal Article] Enlightening the Chemistry of Infalling Envelopes and Accretion Disks Around Sun-Like Protostars: The ALMA FAUST Project (2021)
  • Author(s): Codella C.、Ceccarelli C.、Chandler C.、Sakai N.、Yamamoto S.、The FAUST Team
  • Journal Title: Frontiers in Astronomy and Space Sciences Volume: 8
  • DOI: 10.3389/fspas.2021.782006
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Presentation] キラル氷 III/水界面で水から分離する同素不混和水のスピノーダル様キラル秩序 (2024)
  • Author(s): 新家寛正, 山崎智也, 灘浩樹, 羽馬哲也, 香内晃, 押切友也, 中川勝, 木村勇気
  • Organizer: 令和５年度日本表面真空学会東北・北海道支部学術講演会
• [Presentation] Formation of Local Cage Structures relevant to Methane Clathrate Hydrate under Interstellar Conditions (2023)
  • Author(s): Reo Sato, So Taniguchi, Naoki Numadate, Tetsuya Hama
  • Organizer: JpGU Meeting 2023
• [Presentation] 氷V/水界面に生成する未知の水のスピノーダル分解様ダイナミクス (2023)
  • Author(s): 新家寛正, 山崎智也, 灘浩樹, 羽馬哲也, 香内晃, 押切友也, 中川勝, 木村勇気
  • Organizer: 日本地球惑星科学連合2023年大会
• [Presentation] Infrared measurement for the column density of dangling-OH bonds in amorphous ice at 20 K (2023)
  • Author(s): HASEGAWA, Takeshi, YANAGISAWA, Hiroto, NAGASAWA, Takumi, NUMADATE, Naoki, HAMA, Tetsuya
  • Organizer: 38th Symposium on Chemical Kinetics and Dynamics
  • Int'l Joint Research
• [Presentation] The formation of water-cage structure relevant to methane hydrate in cryogenic and ultrahigh vacuum conditions (2023)
  • Author(s): SATO, Reo, TANIGUCHI, So, NUMADATE, Naoki, HAMA, Tetsuya
  • Organizer: 38th Symposium on Chemical Kinetics and Dynamics
  • Int'l Joint Research
• [Presentation] Purification of liquid carboxylic acids by recrystallization method and measurement of absorption spectra in near UV wavelength (2023)
  • Author(s): SAITO, Shota, TERAOKA, Hidemasa, NUMADATE, Naoki, HAMA, Tetsuya
  • Organizer: 38th Symposium on Chemical Kinetics and Dynamics
  • Int'l Joint Research
• [Presentation] Physics and chemistry of interstellar ice: A laboratory perspective (2023)
  • Author(s): HAMA, Tetsuya
  • Organizer: 38th Symposium on Chemical Kinetics and Dynamics
  • Int'l Joint Research / Invited
• [Presentation] In situ surface analysis of plant cuticle using microscopic attenuated-total-reflection infrared spectroscopy (2023)
  • Author(s): TERAOKA, Hidemasa, SAITO, Shota, NUMADATE, Naoki, OSHIMA, Yoshimi, HAMA, Tetsuya
  • Organizer: 38th Symposium on Chemical Kinetics and Dynamics
  • Int'l Joint Research
• [Presentation] Spectroscopic analysis of the correlation between surface and hydrogen bond network in vapor-deposited amorphous water (2023)
  • Author(s): NAGASAWA, Takumi, HASEGAWA, Takeshi, YANAGISAWA, Hiroto, NUMADATE, Naoki, HAMA, Tetsuya
  • Organizer: 38th Symposium on Chemical Kinetics and Dynamics
  • Int'l Joint Research
• [Presentation] Dynamics study on ultraviolet photodissociation of liquid oleic acid using laser-induced fluorescence (2023)
  • Author(s): KOIZUMI, Kensei, SAITO, Shota, NUMADATE, Naoki, HAMA, Tetsuya
  • Organizer: 38th Symposium on Chemical Kinetics and Dynamics
  • Int'l Joint Research
• [Presentation] Absolute cross section for OH radical desorption during the 213 nm photolysis of liquid nonanoic acid (2023)
  • Author(s): NUMADATE, Naoki, SAITO, Shota, NOJIMA, Yuki, ISHIBASHI, Taka-aki, ENAMI, Shinichi, HAMA, Tetsuya
  • Organizer: 38th Symposium on Chemical Kinetics and Dynamics
  • Int'l Joint Research
• [Presentation] Experimental approaches towards understanding the surface physics and chemistry of interstellar dust and atmospheric aerosols (2023)
  • Author(s): Tetsuya Hama
  • Organizer: XXXIII International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC 2023)
  • Int'l Joint Research / Invited
• [Presentation] Low- and High-Density Unknown Waters at Interfaces between Water and Ices Grown/Melted by Pressure (2023)
  • Author(s): Hiromasa Niinomi, Tomoya Yamazaki, Hiroki Nada, Tetsuya Hama, Akira Kouchi, Tomoya Oshikiri, Masaru Nakagawa, Jun Nozawa, Junpei T. Okada, Satoshi Uda, Yuki Kimura
  • Organizer: The International Conference on Crystal Growth and Epitaxy-ICCGE-20
  • Int'l Joint Research
• [Presentation] Rapid Crystallization at the Surface of Vapor-Deposited Amorphous Water through Hydrates Formation and Dissociation at 120 K (2023)
  • Author(s): Reo Sato, So Taniguchi, Naoki Numadate, Tetsuya Hama
  • Organizer: The 9th International Discussion Meeting on Relaxations in Complex Systems (9 IDMRCS)
  • Int'l Joint Research
• [Presentation] Correlation between surface and bulk hydrogen-bond networks in amorphous water studied by IR-MAIRS (2023)
  • Author(s): Takumi Nagasawa, Takeshi Hasegawa, Naoki Numadate, Tetsuya Hama
  • Organizer: The 9th International Discussion Meeting on Relaxations in Complex Systems (9 IDMRCS)
  • Int'l Joint Research
• [Presentation] Infrared multiple-angle incidence resolution spectrometry for laboratory analogs of interstellar ices (2023)
  • Author(s): Tetsuya Hama
  • Organizer: The 8th Asian Spectroscopy Conference (ASC2023)
  • Int'l Joint Research
• [Presentation] Ultra-High Vacuum Cryogenic Transmission Electron Microscopy of Ices Indicates the Possible Formation of Hydrogen-Ordered Ices (2023)
  • Author(s): Tomoya Yamazaki, Akira Kouchi, Ken-ichiro Murata, Hiroyasu Katsuno, Hiroki Nada, Tetsuya Hama, Yuki Kimura
  • Organizer: The 15th International Conference on the Physics and Chemistry of Ice (PCI-2023)
  • Int'l Joint Research
• [Presentation] Visible Light Induced Photodesorption of Hydroxyl Radicals from Amorphous Solid Water (2023)
  • Author(s): Masashi Tsuge, Ayane Miyazaki, Ni-En Sie, W.M.C. Sameera, Yoichi Nakai, Tetsuya Hama, Hiroshi Hidaka, Akira Kouchi, Naoki Watanabe
  • Organizer: The 15th International Conference on the Physics and Chemistry of Ice (PCI-2023)
  • Int'l Joint Research
• [Presentation] In-Situ Observations of Low- and High-Density Unknown Waters at Interfaces between Water and Ices Grown/Melted by Pressure (2023)
  • Author(s): Hiromasa Niinomi, Tomoya Yamazaki, Hiroki Nada, Tetsuya Hama, Akira Kouchi, Tomoya Oshikiri, Masaru Nakagawa, Jun Nozawa, Junpei T. Okada, Satoshi Uda, Yuki Kimura
  • Organizer: The 15th International Conference on the Physics and Chemistry of Ice (PCI-2023)
  • Int'l Joint Research
• [Presentation] 赤外多角入射分解分光法による極低温アモルファス氷の表面構造解析 (2023)
  • Author(s): 長谷川 健, 柳澤 広登, 長澤 拓海, 沼舘 直樹, 羽馬 哲也
  • Organizer: 第17回分子科学討論会2023
• [Presentation] 液体脂肪酸試薬中に含まれる微量不純物が紫外吸収スペクトルに与える影響 (2023)
  • Author(s): 齊藤 翔大, 沼舘 直樹, 寺岡 秀将, 小林 広和, 江波 進一, 羽馬 哲也
  • Organizer: 第17回分子科学討論会2023
• [Presentation] 高温真空昇温脱離法(TPD)を用いた模擬星間有機物ダストの化学構造の分析 (2023)
  • Author(s): 妹尾梨子, 左近樹, 吉井丈晴, 羽馬哲也, 清水俊介, 川口遼, 尾中敬
  • Organizer: 日本天文学会2023年秋季年会
• [Presentation] 異方スピノーダル様脱濡れが示唆する水/氷V界面における未知の水の液晶性 (2023)
  • Author(s): 新家 寛正, 山崎 智也, 灘 浩樹, 羽馬 哲也, 香内 晃, 押切 友也, 中川 勝, 木村 勇気
  • Organizer: 第72回高分子討論会
• [Presentation] Impurity contribution to photoabsorption of saturated fatty acids and its implications to tropospheric chemistry (2023)
  • Author(s): T. Hama, S. Saito, N. Numadate, H. Teraoka, S. Enami, H. Kobayashi
  • Organizer: Workshop on Interstellar Matter 2023 (ISM2023)
  • Int'l Joint Research
• [Presentation] Experimental measurement for absorption cross section of two-coordinated dangling OH bonds on the surface of amorphous ice at 20 K (2023)
  • Author(s): T. Hasegawa, H. Yanagisawa, T. Nagasawa, N. Numadate, T. Hama
  • Organizer: Workshop on Interstellar Matter 2023 (ISM2023)
  • Int'l Joint Research
• [Presentation] In situ electron diffraction analysis of stacking sequences in ice I under interstellar conditions (2023)
  • Author(s): R. Sato, S. Taniguchi, N. Numadate, T. Hama
  • Organizer: Workshop on Interstellar Matter 2023 (ISM2023)
  • Int'l Joint Research
• [Presentation] 液体脂肪酸の光吸収断面積と対流圏での光分解速度 (2023)
  • Author(s): 齊藤翔大, 沼舘直樹, 寺岡秀将, 小林広和, 江波進一, 羽馬哲也
  • Organizer: 第28回大気化学討論会(2023)
• [Presentation] 不純物を除去した液相脂肪酸の紫外吸収スペクトルと吸収断面積 (2023)
  • Author(s): 羽馬 哲也, 齊藤 翔大, 沼舘 直樹, 寺岡 秀将, 小林 広和, 江波 進一
  • Organizer: 原子衝突学会 第48回年会
• [Presentation] 液体有機物界面の光分解ダイナミクス研究への挑戦 (2023)
  • Author(s): 沼舘 直樹, 小泉 憲生, 齊藤 翔大, 羽馬 哲也
  • Organizer: 原子衝突学会 第48回年会
• [Presentation] 氷V/水界面の未知の水のスピノーダル様脱濡れにおける異方性 (2023)
  • Author(s): 新家寛正, 山崎智也, 灘浩樹, 羽馬哲也, 香内晃, 麻川明俊, 押切友也, 中川勝, 木村勇気
  • Organizer: 第52回結晶成長国内会議（JCCG-52）
• [Presentation] 極低温赤外多角入射分解分光法による分子性固体の構造と物性解析 (2023)
  • Author(s): 羽馬哲也
  • Organizer: 第70回応用物理学会春季学術講演会シンポジウム：T22 極性分子薄膜における分極の自発配向制御とその応用
  • Invited
• [Presentation] Interstellar dust chemistry: an interdisciplinary science covering quantum chemistry and astronomy (2023)
  • Author(s): Tetsuya Hama
  • Organizer: 第2回日加先端科学(JCFoS)シンポジウム 2023年
  • Int'l Joint Research
• [Presentation] 星間塵と地球大気エアロゾルの表面科学：二分子、一分子、二分の一分子が果たす役割 (2023)
  • Author(s): 羽馬哲也
  • Organizer: 2022年度「一分子の科学」 研究報告会
  • Invited
• [Presentation] アモルファス氷表面におけるダングリングOHの吸収断面積と存在比 (2023)
  • Author(s): 長谷川 健, 柳澤 広登, 長澤 拓海, 羽馬 哲也
  • Organizer: 次世代アストロケミストリー第3回領域全体集会
• [Presentation] 新規計測法で明らかにする宇宙と地球の化学：星間塵から海洋表面マイクロ層まで (2022)
  • Author(s): 羽馬哲也
  • Organizer: 第2回マテリアル・計測ハイブリッド研究センター若手フォーラム
  • Invited
• [Presentation] 分光で探る宇宙と地球の物質科学 (2022)
  • Author(s): 羽馬哲也
  • Organizer: 2022年日本分光学会年次講演会 分光イノベーション研究会 「分光学夢シンポジウム」
  • Invited
• [Presentation] 地球宇宙化学における原子衝突的視点の重要性 (2022)
  • Author(s): 羽馬哲也
  • Organizer: 原子衝突学会第47回年会
  • Invited
• [Presentation] アモルファス氷表面の3配位ダングリングOH基の赤外吸収断面積測定実験 (2022)
  • Author(s): 羽馬哲也
  • Organizer: 第16回分子科学討論会
• [Presentation] Neマトリックス界面における極低温での結晶氷の生成 (2022)
  • Author(s): 佐藤玲央, 谷口創, 沼舘直樹, 羽馬哲也
  • Organizer: 第51回結晶成長国内会議（JCCG-51）
• [Presentation] 高圧下で成長する氷 V 水界面に生成する未知の水のダイナミクス (2022)
  • Author(s): 新家寛正, 山崎智也, 灘浩樹, 羽馬哲也, 香内晃, 押切友也, 中川勝, 木村勇気
  • Organizer: 第51回結晶成長国内会議（JCCG-51）
• [Presentation] IR-MAIRSによるアモルファス氷の構造解析と結晶化現象 (2022)
  • Author(s): 長澤 拓海, 長谷川 健, 沼舘直樹, 羽馬哲也
  • Organizer: 第16回分子科学討論会
• [Presentation] H2O/Ne-マトリックス昇華法により極低温で生成した氷の結晶構造の決定 (2022)
  • Author(s): 佐藤 玲央, 谷口 創, 沼舘 直樹, 羽馬 哲也
  • Organizer: 第16回分子科学討論会
• [Presentation] 液体ノナン酸の光反応におけるOHラジカル生成の定量 (2022)
  • Author(s): 沼舘直樹, 齊藤翔太, 野嶋優妃, 石橋孝章, 江波進一, 羽馬哲也
  • Organizer: 第16回分子科学討論会
• [Presentation] Reflection High-Energy Electron Diffraction study of cristalline ice formed in cryogenic environments (2022)
  • Author(s): SATO, Reo, TANIGUCHI, So, NUMADATE, Naoki, HAMA, Tetsuya
  • Organizer: 37th Symposium on Chemical Kinetics and Dynamics
  • Int'l Joint Research
• [Presentation] Structural characterization of vapor-deposited amorphous water by decoupled-OD stretching mode (2022)
  • Author(s): NAGASAWA, Takumi, HASEGAWA, Takeshi, NUMADATE, Naoki, HAMA, Tetsuya
  • Organizer: 37th Symposium on Chemical Kinetics and Dynamics
  • Int'l Joint Research
• [Presentation] cross section, fluorescence, and photodissociation of liquid carboxylic acids at 213 and 266 nm (2022)
  • Author(s): SAITO, Shota, NUMADATE, Naoki, HAMA, Tetsuya
  • Organizer: 37th Symposium on Chemical Kinetics and Dynamics
  • Int'l Joint Research
• [Presentation] Infrared multiple-angle incidence resolution spectrometry for measurement of the absorption cross section of dangling-OH bonds in water ice (2022)
  • Author(s): HASEGAWA, Takeshi, NAGASAWA, Takumi, NUMADATE, Naoki, HAMA, Tetsuya
  • Organizer: 37th Symposium on Chemical Kinetics and Dynamics
  • Int'l Joint Research
• [Presentation] Low- and High Density Unknown Waters at Ice/Water Interfaces under High Pressure (2022)
  • Author(s): Hiromasa Niinomi, Akira Kouchi, Tetsuya Hama, Hiroki Nada, Tomoya Yamazaki, Yuki Kimura
  • Organizer: JpGU Meeting 2022
• [Presentation] Infrared multiple-angle resolution spectroscopy of interstellar ice analog in cryogenic environment (2022)
  • Author(s): Takeshi Hasegawa, Takumi Nagasawa, Naoki Numadate, Tetsuya Hama
  • Organizer: The 6th Asian Workshop on Molecular Spectroscopy
  • Int'l Joint Research
• [Presentation] Direct detection of OH radicals in the photolysis of liquid nonanoic acid using laser-induced fluorescence (2022)
  • Author(s): S. Saito, N. Numadate, Y. Nojima, T. Ishibashi, S. Enami, T. Hama
  • Organizer: The 6th Asian Workshop on Molecular Spectroscopy
  • Int'l Joint Research
• [Presentation] Absolute band strength and orientation of dangling OH bonds in amorphous water (2022)
  • Author(s): Tetsuya Hama
  • Organizer: Symposium on Next Generation Astrochemistry
  • Int'l Joint Research
• [Presentation] Desorption of OH radicals in the ultraviolet photolysis of liquid nonanoic acid using laser induced fluorescence (2021)
  • Author(s): Numadate Naoki、Hama Tetsuya
  • Organizer: 36th Symposium on Chemical Kinetics and Dynamics
  • Int'l Joint Research
• [Presentation] An infrared spectroscopic approach towards understanding the orientation of dangling OH bonds on amorphous solid water (ASW) (2021)
  • Author(s): Nagasawa Takumi、Numadate Naoki、Hama Tetsuya
  • Organizer: 36th Symposium on Chemical Kinetics and Dynamics
  • Int'l Joint Research
• [Presentation] 低温H2O氷表面からのOHラジカルの可視光脱離過程 (2021)
  • Author(s): 柘植 雅士、宮﨑 彩音、W.M.C. Sameera 、中井 陽一、羽馬 哲也、日高 宏、香内 晃、渡部 直樹
  • Organizer: 第15回分子科学討論会
• [Presentation] レーザー誘起蛍光法を用いた液体界面の光化学反応による OHラジカル生成の検証 (2021)
  • Author(s): 沼舘 直樹、羽馬 哲也
  • Organizer: 第15回分子科学討論会
• [Presentation] 赤外多角入射分解分光法によるアモルファス分子性固体の構造解析 (2021)
  • Author(s): 羽馬 哲也、石橋 篤季、香内 晃、渡部 直樹、塩谷 暢貴、下赤 卓史、長谷川 健
  • Organizer: 第15回分子科学討論会
• [Presentation] Development of the RHEED apparatus for in situ structural analysis of water ices in low-temperature and ultrahigh vacuum conditions (2021)
  • Author(s): Sato Reo、Taniguchi So、Numadate Naoki、Hama Tetsuya
  • Organizer: Workshop on Interstellar matter 2021
  • Int'l Joint Research
• [Presentation] First direct detection of OH radicals photodesorbed from liquid organic surface by using laser-induced fluorescence technique (2021)
  • Author(s): Numadate Naoki、Saito Shota、Hama Tetsuya
  • Organizer: Workshop on Interstellar matter 2021
  • Int'l Joint Research
• [Presentation] An infrared spectroscopic approach towards understanding the orientation of dangling OH bonds on amorphous solid water (2021)
  • Author(s): Nagasawa Takumi、Hasegawa Takeshi、Numadate Naoki、Hama Tetsuya
  • Organizer: Workshop on Interstellar matter 2021
  • Int'l Joint Research
• [Presentation] Experimental measurement of the absorption cross section of dangling OH bonds in water ice (2021)
  • Author(s): Hama Tetsuya、Nagasawa Takumi、Hasegawa Takeshi、Numadate Naoki
  • Organizer: Workshop on Interstellar matter 2021
  • Int'l Joint Research
• [Presentation] Low-temperature ultrahigh-vacuum MAIRS for the study of interstellar ice analogues (2021)
  • Author(s): Tetsuya Hama
  • Organizer: The International Chemical Congress of Pacific Basin Societies 2021
  • Int'l Joint Research / Invited
• [Presentation] OH radical formation following photodissociation of liquid organic surfactant (2021)
  • Author(s): Tetsuya Hama
  • Organizer: The 6th International Workshop on Heterogeneous Kinetics Related to Atmospheric Aerosols
  • Int'l Joint Research / Invited
• [Presentation] Release of hydroxyl radicals from photodissociation of liquid hydrophobic organics (2021)
  • Author(s): Tetsuya Hama
  • Organizer: 7th Global Plasma Forum
  • Int'l Joint Research / Invited
• [Presentation] 分光学的手法を用いた宇宙における物質進化の実験的解明 (2021)
  • Author(s): 羽馬 哲也
  • Organizer: 2021年度日本分光学会年次講演会
  • Invited
• [Presentation] 真空蒸着薄膜のその場構造解析のための赤外多角入射分解分光法装置の開発 (2021)
  • Author(s): 羽馬 哲也
  • Organizer: FT-IR・ラマン バーチャル・ユーザーズフォーラム 2021
  • Invited
• [Presentation] MAIRS2による極低温の真空蒸着薄膜のその場構造解析 (2021)
  • Author(s): 羽馬 哲也
  • Organizer: 第5回MAIRSワークショップ―MAIRSで進める薄膜工学―
  • Invited
• [Book] 植物の超階層生物学: ゲノミクス×フェノミクス×生態学でひもとく多様性 第7章 赤外分光法によるヤセイカンランのクチクラの構造解析 -物理化学者による非破壊計測の試み (2023)
  • Author(s): 羽馬 哲也 , 関 功介
  • Total Pages: 344
  • Publisher: 文一総合出版
  • ISBN: 9784829962107
• [Book] 宇宙の化学 (2023)
  • Author(s): 羽馬 哲也
  • Total Pages: 116
  • Publisher: 岩波書店
  • ISBN: 9784000297172
• [Remarks] 物質進化の謎を解き明かす『宇宙の化学』の物語
  • URL: https://10mtv.jp/pc/column/article.php?column_article_id=3813
• [Remarks] 東大と筑波大、海洋エアロゾルに含まれる脂肪酸の光吸収効率を決定することに成功
  • URL: https://www.nikkei.com/article/DGXZRSP662193_Z10C23A9000000/
• [Remarks] 海洋エアロゾル、太陽光ほぼ吸収せず 東大など解明、気候変動予測の精度向上
  • URL: https://www.nikkan.co.jp/articles/view/00686472
• [Remarks] 東北大・北大・鳥取大・東大、キラルな高圧氷と水の界面にキラル液晶らしき水を発見
  • URL: https://www.nikkei.com/article/DGXZRSP666818_R10C24A1000000/