Study of the radiation produced by therapeutic He, C and O ion beams impinging on a PMMA target. (15th February 2016) - Battistoni, G.; Collamati, F.; De Lucia, E.; Faccini, R.; Frallicciardi, P.M.; Mancini, C.; Marafini, M.; Mattei, I.; Muraro, S.; Paramatti, R.; Patera, V.; Piersanti, L.; et al.