Exchange Effects in the Radiative Capture Reactions 3H(α, γ)7Li and 3He(α, γ)7Be A.S Solovyev, S.Yu. Igashov and Yu.M. Tchuvil’sky EPJ Web of Conferences, 117 (2016) 09017 Published online: 11 May 2016 DOI: 10.1051/epjconf/201611709017