Analysis of energy-dependent isospin violation in inelastic scattering of deuterons from 14N and 10B

The isospin-forbidden inelastic scattering of deuterons from 14N and 10B are studied at several incident energies around Esub(d) = 10 MeV. The isospin mixing due to the Coulomb interaction in the intermediate one-nucleon transfer channels are evaluated in terms of the second-order distorted-wave Born approximation. The strongly energy-dependent isospin violation observed in both cases can be explained without taking into account any isospin mixing for internal wave functions of target nuclei involved. The dominant contributions to the reaction cross section come from the destructive interference between two-step processes via 3He and triton intermediate channels. The contributions become largest around the incident energies associated with the thresholds of these intermediate channels. Inclusion of proton and neutron intermediate channels enhances the cross section. Localization of isospin violation in the angular momentum space is also investigated. (Auth.)