Test of the Barshay-Temmer theorem for the reaction [formula omitted

Abstract

The Barshay-Temmer theorem has been tested via the reaction 10B(α, 7Li g.s.) 7Be g.s.and 10B(α, 7Be g.s.) 7Li g.s. at E α =46 MeV. In order to minimize experimental uncertainties, angular distributions for both reactions were measured simultaneously; the symmetry required by the theorem was shown by the fact that the ratio between the intensities of the outgoing particles at a fixed angle is unity within the experimental uncertainties. This implies an extreme similarity of the wave functions of the ground-state isobaric doublet 7Li- 7Be and provides a simple test of the charge independence of nuclear forces.