Infrared and Raman spectroscopies of refractory residues left over after ion irradiation of nitrogen-bearing icy mixtures

被引：46

作者：

Palumbo, ME ^{[1
]}

Ferini, G ^{[1
]}

Baratta, GA ^{[1
]}

机构：

[1] Osserv Astrofis Catania, INAF, I-95123 Catania, Italy

来源：

SPACE LIFE SCIENCES: STEPS TOWARD ORIGIN(S) OF LIFE | 2004年 / 33卷 / 01期

关键词：

infrared spectroscopy; Raman spectroscopy; laboratory measurements; Frozen CH4 (methane); ices ill the solar system; cosmic ion processing;

D O I：

10.1016/j.asr.2003.03.002

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

Using infrared and Raman spectroscopics, we have Studied the effects induced by ion irradiation on icy mixtures at low temperature (T = 12 K) and after warm up to room temperature. In particular, we have considered mixtures made of H2O, CO, CH4, and N-2. These mixtures have been irradiated with 30 keV He+ and 60 keV Ar2+ ions. After ion irradiation at low temperature, several new absorption features appear in the infrared spectra, some of which may be due to N-bearing molecular species. A refractory organic residue is left over after warm-up to room temperature. After further irradiation of the residue at room temperature, the intensity of all infrared absorption features decreases. Raman spectroscopy of similar mixtures has shown that ion irradiation causes a modification of the structure of the samples which evolve towards an amorphous carbon. (C) 2003 COSPAR. Published by Elsevier Ltd. All rights reserved.

引用

页码：49 / 56

页数：8

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