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Contributions of unique first-forbidden transitions to two-neutrino double-β-decay half-lives

Authors
Journal
Nuclear Physics A
0375-9474
Publisher
Elsevier
Publication Date
Volume
607
Issue
2
Identifiers
DOI: 10.1016/0375-9474(96)00225-4
Disciplines
  • Physics

Abstract

Abstract The two-neutrino double-β-decay transition of 76Ge to the ground state of 76Se is calculated using a realistic proton-neutron force and including unique first-forbidden single-β-decay transitions to virtual 2 − intermediate states. The corresponding nuclear matrix elements are computed by using the proton-neutron quasiparticle random-phase approximation (pn-QRPA). From the results of the present study it is concluded that the inclusion of virtual unique first-forbidden transitions, as possible “new” steps contributing to the half-life of the two-neutrino double-β-decay mode, can be disregarded.

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