Radiolysis of H2O:CO2 ices by heavy energetic cosmic ray analogs S. Pilling, E. Seperuelo Duarte, A. Domaracka, H. Rothard, P. Boduch and E. F. da Silveira A&A, 523 (2010) A77 Published online: 18 November 2010 DOI: 10.1051/0004-6361/201015123