Shell-model study of the highly forbidden beta decay
Department of Physics, University of Jyväskylä
P.O. Box 35 (Y5 ), 40351 Jyväskylä, Finland
Accepted: 18 March 1999
Ordinary decay of the + ground state of is studied. Partial half-lives for the highly-forbidden transitions to the three lowest-lying states of are calculated by using both the harmonic oscillator and the Woods-Saxon mean-field wave functions. We find the decay to be dominated, as expected, by the unique fourth-forbidden transition to the excited 5+ state of . The theoretical beta-decay half-life of is found to be years which is approximately 25 times longer than the measured double-beta-decay half-life of years.
PACS: 21.60.Cs – Shell model / 23.40.-s – Decay; double decay; electron and muon capture / 23.40.Hc – Relation with nuclear matrix elements and nuclear structure
© EDP Sciences, 1999