PRODUCTION OF E1 RADIATION IN THE H-2(D,GAMMA)HE-4 REACTION AT VERY-LOW ENERGIES

An argument is given that the mechanism of charge polarization cannot give rise to E1 radiation in the H-2(d, gamma)He-4 reaction. It then f ollows that E1 radiation produced in this reaction probably arises fro m the spin-dependent part of the E1 operator, although small E1 admixt ures have been shown to arise in coupled-channels calculations as a re sult of Coulomb-induced isospin mixing in H-3 and He-3. A proper calcu lation of this reaction should consider meson-exchange currents and re mains to be performed.