Contribution Invited Talk
Ice experiments in Catania
The experimental activity that we carry out in Catania is mainly devoted to the study of the effects induced by fast ions (30-400 keV) and UV photons (energetic processing) on astrophysically relevant solids (ice mixtures, silicates, and carbonaceous materials). Ices samples (10-300 K) are analyzed by Infrared and Raman spectroscopy which are two powerful techniques to evidence the formation of new molecular species and of an organic residue left over at room temperature as well as modification in the structure of the ice. These experiments have a twofold purpose: (1) Infrared spectra can be directly compared to observed spectra of ices in the line of sight of dense molecular clouds in order to gain information on the chemical composition, temperature, and structure of interstellar ices; (2) Identification of new species formed can contribute to our understanding of the origin of molecules detected in the gas phase after icy mantle desorption in star forming regions. Here I will present some recent results.
Presently the group working at the Laboratory for Experimental Astrophysics in Catania (Italy) is composed by M. Accolla, G.A. Baratta, G. Fedoseev, M.E. Palumbo, C. Sciré, G. Strazzulla, and R.G. Urso.