T(T,2n)4He and 3He(3He,2p)4He: The Reaction Mechanism from Solar Energies to 10 MeV A.D. Bacher, C.R Brune, D.B. Sayre, G.M. Hale, J.A. Frenje and M. Gatu Johnson EPJ Web Conf., 113 (2016) 03003 Published online: 25 March 2016 DOI: 10.1051/epjconf/201611303003