Microscopic nuclear-structure calculations for the solar-neutrino detector Ga-71 and close-lying isobars

摘要

In the present solar-neutrino experiments, mainly observing the pp contribution of the solar-neutrino flux, an important role is played by Ga-71. The structure of this detector nucleus and three of its isobars have been calculated by using the microscopic quasiparticle-phonon model. Using a realistic effective two-body interaction in a realistic valence space, the method yielded energy spectra in good agreement with experiments. The calculated log ft values for a number of spontaneous and neutrino-induced Gamow-Teller transitions, when compared with the experimental results, gave qualitatively correct but overestimated transition-strength values in most cases. (C) 2002 Elsevier Science B.V. All rights reserved. [References: 26]