Swift heavy ion modifications of astrophysical water ice

E. Dartois 1 B. Augé 1 H. Rothard 2 P. Boduch 2 R. Brunetto 1 M. Chabot 3 A. Domaracka 2 J.-J. Ding 2 O. Kamalou 2 X.-Y. Lv 2 E. Frota da Silveira J.C. Thomas 4 T. Pino 5 C. Mejia M. Godard 6 A.L.F. de Barros
1 IAS - Institut d'astrophysique spatiale
2 CIMAP - UMR 6252 - Centre de recherche sur les Ions, les MAtériaux et la Photonique
3 IPNO - Institut de Physique Nucléaire d'Orsay
4 GANIL - Grand Accélérateur National d'Ions Lourds
5 ISMO - Institut des Sciences Moléculaires d'Orsay
6 CSNSM AS - Centre de Sciences Nucléaires et de Sciences de la Matière
Abstract : In the relatively shielded environments provided by interstellar dense clouds in our Galaxy, infrared astronomical observations have early revealed the presence of low temperature (10–100 K) ice mantles covering tiny grain ‘‘cores” composed of more refractory material. These ices are of specific interest because they constitute an interface between a solid phase under complex evolution triggered by energetic processes and surface reactions, with a rich chemistry taking place in the gas phase. The interstellar ice mantles present in these environments are immersed, in addition to other existing radiations fields, in a flux of cosmic ray particles that can produce new species via radiolysis processes, but first affects their structure, which may change and also induces desorption of molecules and radicals from these grains. Theses cosmic rays are simulated by swift ions in the laboratory for a better understanding of astrophysical processes.
Keywords : Interstellar medium abundances Molecular processes Interstellar dust Astrochemistry Cosmic rays
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Conference papers
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Submitted on : Monday, November 30, 2015 - 3:59:11 PM
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E. Dartois, B. Augé, H. Rothard, P. Boduch, R. Brunetto, et al.. Swift heavy ion modifications of astrophysical water ice. 19th International Conference on Ion Beam Modification of Materials (IBMM 2014), Sep 2014, Leuven, Belgium. pp.472-476, ⟨10.1016/j.nimb.2015.08.053⟩. ⟨in2p3-01235746⟩

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