@inproceedings{oai:jaxa.repo.nii.ac.jp:00020514,
 author = {黒澤, 耕介 and 石橋, 高 and 杉田, 精司 and 門野, 敏彦 and 大野, 宗祐 and 松井, 孝典 and Kurosawa, Kosuke and Ishibashi, Ko and Sugita, Seiji and Kadono, Toshihiko and Ono, Sosuke and Matsui, Takafumi},
 book = {第39回月・惑星シンポジウム, Proceedings of the 39th ISAS Lunar and Planetary Symposium},
 month = {Aug},
 note = {Hydrogen Cyanide (HCN) is considered as one of most important compounds for the origin of life because it is a precursor of complex organic molecules, such as amino acids and nucleic acid bases. Although a number of different mechanisms of HCN formation on the early Earth have been studied, HCN formation due to large impacts is particular important because it produces a large amount of HCN in a short period of time. We focus on the chemical interaction between impact-induced vapor clouds and a planetary atmosphere. Impact experiments by Sugita & Schultz (2000) show that a large amount of CN radicals may be produced by carbon-rich meteoritic material within a nitrogen-rich atmosphere. The produced CN radicals may react with water vapor in an ambient atmosphere and generate HCN. However, high-temperature CN may also destroy to CO and NO via chemical reactions with the ambient atmosphere. In this study, we conduct laser ablation experiments using a Gas Chromatograph Mass Spectrometer (GCMS) to examine whether impact-generated CN radicals lead to HCN formation. Graphite targets and gas mixtures of nitrogen and water vapor were used in our experiments. We found a strong correlation between the yield of HCN and the chemical composition of the model atmosphere. Although little HCN was detected in N2 atmospheres, a large amount of HCN was detected in a N2-H2O atmosphere. This result strongly suggests that impact-generated CN radicals may lead to HCN formation., 資料番号: AA0063505052},
 pages = {202--205},
 publisher = {宇宙航空研究開発機構宇宙科学研究本部, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA/ISAS)},
 title = {HCN formation by the chemical interaction between high-speed impact fragments and a planetary atmosphere},
 year = {2006}
}