Investigation of elementary processes in photochemical reaction on icy grain surface
| Project/Area Number |
23684045
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| Research Category |
Grant-in-Aid for Young Scientists (A)
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| Allocation Type | Single-year Grants |
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| Research Field |
Geochemistry/Astrochemistry
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| Research Institution | Kyushu University (2014)
Kyoto University (2011-2013) |
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Principal Investigator |
YABUSHITA AKIHIRO 九州大学, 総合理工学研究科(研究院), 准教授 (70371151)
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| Project Period (FY) |
2011-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥28,990,000 (Direct Cost: ¥22,300,000、Indirect Cost: ¥6,690,000)
Fiscal Year 2014: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2013: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2012: ¥7,540,000 (Direct Cost: ¥5,800,000、Indirect Cost: ¥1,740,000)
Fiscal Year 2011: ¥16,510,000 (Direct Cost: ¥12,700,000、Indirect Cost: ¥3,810,000)
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| Keywords | 宇宙化学 / 物理化学 / 光化学反応 / 星間化学 / 天文学 / 反応ダイナミクス / 表面反応 / 氷 / 化学物理 / 反応素過程 / 氷星間塵 / レーザー / 宇宙科学 / 天文 |
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| Outline of Final Research Achievements |
The presence of icy mantles on interstellar dust grains plays a key role in the formation of molecules in the interstellar medium. To reveal the details of the elementary processes in photochemical reaction on icy grain surface, a instrument to measure translational and ro-vibrational energy of gaseous products formed by photolysis of ices at low temperatures below 10 K was developed. The 157 nm photodissociation of neat H2O, CO2, CO, CH3OH ice or these molecules adsorbed on water ice was investigated by analyzing the time-of-flight (TOF) mass spectra of photofragments such as H, OH, CO, etc by resonance-enhanced multiphoton ionization techniques. IR reflection absorption spectroscopy (IRAS) was utilized for characterization of water ice structures as well as for analysis of adsorbates and products on the ice surface. Photochemical processes on icy grain surface were successfully studied from a surface reaction dynamics’ point of view.
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Report
(5 results)
Research Products
(25 results)
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[Journal Article] Characteristics of atmospheric aerosols containing heavy metals measured on Fukue Island, Japan2014
Author(s)
T. Hidemori, T. Nakayama, Y. Matsumi, T. Kinugawa, A. Yabushita, M. Ohashi, T. Miyoshi, S. Irei, A. Takami, N. Kaneyasu, A. Yoshino, R. Suzuki, Y. Yumoto, S. Hatakeyam
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Journal Title
Atmospheric Environment
Volume: 97
Pages: 447-455
DOI
Related Report
Peer Reviewed / Open Access
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