Direct evidence of α-particle condensation for the Hoyle state Ad. R. Raduta, B. Borderie, E. Geraci, N. Le Neindre, P. Napolitani and M. F. Rivet EPJ Web of Conferences, 31 (2012) 00034 Published online: 05 July 2012 DOI: 10.1051/epjconf/20123100034