@inproceedings{oai:jaxa.repo.nii.ac.jp:00020378,
 author = {黒澤, 耕介 and 杉田, 精司 and 長谷川, 直 and 長岡, 洋一 and 松井, 孝典 and Kurosawa, Kosuke and Sugita, Seiji and Hasegawa, Sunao and Nagaoka, Yoichi and Matsui, Takafumi},
 book = {月・惑星シンポジウム, Proceedings of the ISAS lunar and planetary symposium},
 month = {Aug},
 note = {第42回 月・惑星シンポジウム(2009年8月5-7日, 宇宙航空研究開発機構宇宙科学研究本部), The 42nd ISAS Lunar and Planetary Symposium (August 5-7, 2009. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)), Sagamihara, Kanagawa Japan, Cyanide compounds are among the most important molecules in the chemical evolution phase of the origin of life. In our previous studies, we carried out laser ablation experiments within gas mixtures to simulate chemical reactions between impact-induced CN radicals and an ambient atmosphere after oblique impacts. We found that a large amount of cyanides are produced even within CO2-rich ambient gases. However, it is not clear how well laser-induced vapor plumes simulate vapor plume due to aerodynamic ablation of high-speed fragments from oblique impacts. In this study, we conducted hypervelocity oblique impact experiments in an N2 gas to compare the thermodynamic states of laser-ablation vapor and real impacts. Using high-speed spectroscopic measurements, the vibrational states and translational-rotational temperatures of impact-induced CN radicals are estimated. We found that the translational-rotational temperature of CN and C2 by impacts at ca.7 km/s of impact velocity was close to that by laser ablation with 9.0 x 10(exp 8)W/cm2 of laser intensity Experimental results indicate that laser ablation can simulate aerodynamic ablation process due to oblique impacts including vibrational non-equilibrium. This suggests that cyanide production efficiency estimated by laser ablation can apply to impact processes. Thus, impacts of C-rich meteorites may cause significant concentration of cyanide on the early Earth., 形態: カラー図版あり, 形態: CD-ROM1枚, Physical characteristics: Original contains color illustrations, Note: One CD-ROM, 資料番号: AA0064739034},
 pages = {146--149},
 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)},
 title = {Spectroscopic observations on CN radical production process due to oblique impacts: Thermodynamic states of impact- and laser-induced CN radicals},
 volume = {42},
 year = {2009}
}