Effect of inclusion of 1g orbits on the Gamow-Teller strengths for the capture rates of solar neutrinos in Ga detectors

Neutrino capture rates for Ga detectors are calculated using a simple model for the Gamow-Teller strength distribution in an extended shell model space consisting of (1f2p1g) orbits and compared to the values obtained in the (1f2p) model space. It is seen that though the Gamow-Teller strength functions for the two model spaces differ at energies greater than the neutron emission threshold of ⁷¹Ge, the difference is small below this energy. This results in a vanishingly small change in the neutrino capture cross section and consequently the actual capture rate.