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Communication Dans Un Congrès Année : 2010

Irradiation effects in CO and CO2 ices induced by swift heavy Ni ions at 46 MeV and 537 MeV

Résumé

In order to simulate the effects of the heavy ion component of cosmic rays on ices in astrophysical environments, the CO and CO2 ices were irradiated with swift nickel ions in the electronic energy loss regime. The ices were prepared by condensing gas onto a CsI substrate at a temperature of 14 K and analyzed by means of infrared (FTIR) spectroscopy. The physical process of deposition by Ni ions is similar to more important and abundant heavy cosmic rays such as Fe ions. Dissociation of the ice molecules, and formation of new molecules were observed. Also, sputtering (leading to desorption of molecules from the solid surface to the gas phase) was observed. It was found that the sputtering yield due to heavy ions cannot be neglected with respect to desorption induced by weakly ionizing particles such as UV photons and protons.
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Dates et versions

hal-00480203 , version 1 (03-05-2010)

Identifiants

  • HAL Id : hal-00480203 , version 1

Citer

Alicja Domaracka, Eduardo Seperuelo Duarte, Philippe Boduch, Hermann Rothard, Emmanuel Balanzat, et al.. Irradiation effects in CO and CO2 ices induced by swift heavy Ni ions at 46 MeV and 537 MeV. Proceedings of the International Astronomical Union 5 (2010) 428-429 / Symposium S265 - Chemical abundances in the Universe – connecting First Stars to Planets, 2009, France. pp.428-429. ⟨hal-00480203⟩
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