Comparison of UV and high-energy ion irradiation of methanol:ammonia iceG. M. Muñoz Caro, E. Dartois, P. Boduch, H. Rothard, A. Domaracka and A. Jiménez-EscobarA&A, 566 (2014) A93DOI: https://doi.org/10.1051/0004-6361/201322983