First observation of gamma-rays from the proton emitter T. Bäck, B. Cederwall, K. Lagergren, R. Wyss, A. Johnson, D. Karlgren, P. Greenlees, D. Jenkins, P. Jones, D.T. Joss et al. (12 more) Eur. Phys. J. A, 16 4 (2003) 489-494 Published online: 25 March 2003 DOI: 10.1140/epja/i2002-10108-7