COSMIC-RAY-MEDIATED FORMATION OF BENZENE ON THE SURFACE OF SATURN'S MOON TITAN

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题名:	COSMIC-RAY-MEDIATED FORMATION OF BENZENE ON THE SURFACE OF SATURN'S MOON TITAN
作者:	Zhou,L;Zheng,WJ;Kaiser,RI;Landera,A;Mebel,AM;Liang,MC;Yung,YL
贡献者:	天文研究所
关键词:	QUADRATIC CONFIGURATION-INTERACTION;MASS-SPECTROMETRY;ATMOSPHERE;IONIZATION;PHOTOCHEMISTRY;ENERGIES;SPECTRA;DENSITY;MODEL;MALDI
日期:	2010
上传时间:	2012-03-27 18:08:17 (UTC+8)
出版者:	國立中央大學
摘要:	The aromatic benzene molecule (C(6)H(6))-a central building block of polycyclic aromatic hydrocarbon molecules-is of crucial importance for the understanding of the organic chemistry of Saturn's largest moon, Titan. Here, we show via laboratory experiments and electronic structure calculations that the benzene molecule can be formed on Titan's surface in situ via non-equilibrium chemistry by cosmic-ray processing of low-temperature acetylene (C(2)H(2)) ices. The actual yield of benzene depends strongly on the surface coverage. We suggest that the cosmic-ray-mediated chemistry on Titan's surface could be the dominant source of benzene, i.e., a factor of at least two orders of magnitude higher compared to previously modeled precipitation rates, in those regions of the surface which have a high surface coverage of acetylene.
關聯:	ASTROPHYSICAL JOURNAL
显示于类别:	[天文研究所] 期刊論文

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