Nitrogen oxides and carbon chain oxides formed after ion irradiation of CO:N2 ice mixtures D. Sicilia, S. Ioppolo, T. Vindigni, G. A. Baratta and M. E. Palumbo A&A, 543 (2012) A155 Published online: 13 July 2012 DOI: 10.1051/0004-6361/201219390