Modification of ices by cosmic rays and solar wind
Modification of ices by cosmic rays and solar wind
复制标题
宇宙射线和太阳风对冰的改变
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
E. Dartois
中科院分区：
文献类型：
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作者：
H. Rothard;A. Domaracka;P. Boduch;M. Palumbo;G. Strazzulla;E. F. da Silveira;E. Dartois
天体物理学上的冰暴露在不同的辐射场中，包括光子、电子和离子。后者来自星际宇宙射线（CR），太阳风和恒星风，冲击波或被困在巨行星的磁层中。本文简要讨论了离子红外辐射在凝聚态物质中能量沉积的物理过程，以及研究其诱导效应的实验方法。然后，我们提出的结果辐射效应，如溅射，非晶化和压实，解离的分子，形成新的分子物种后，辐解和离子注入。有机分子的形成和抗辐射性，与生命出现的初始条件问题有关，简要讨论。这篇评论并不意味着是全面的，而是集中在最近的研究结果，特别强调与重多电荷离子束的实验。这些实验特别旨在模拟CRs对密集分子云中冰粒的影响，以及对太阳系中冰体分子形成的影响。
Astrophysical ices are exposed to different radiation fields including photons, electrons and ions. The latter stem from interstellar cosmic rays (CR), the solar and stellar winds, shock waves or are trapped in the magnetospheres of giant planets. We briefly discuss the physics of energy deposition by ion ir radiation in condensed matter and experimental methods to study the induced effects. We then present results on radiation effects such as sputtering, amorphisation and compaction, dissociation of molecules, formation of new molecular species after radiolysis and by implantation of ions. The formation and radio-resistance of organic molecules, related to the question of the initial conditions for the emergence of life, are briefly discussed. This review is not meant to be comprehensive, but rather focusses on recent findings, with special emphasis on experiments with heavy multiply charged ion beams. These experiments aim in particular at simulating the effects of CRs on icy grains in dense molecular clouds, and on the formation of molecules on icy bodies in the Solar System.