Gamow-Teller matrix elements for two-neutrino double β decay within a second quasi-random-phase approximation

S. Stoica and W. A. Kaminski
Phys. Rev. C 47, 867 – Published 1 February 1993
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Abstract

A second quasi-random-phase approximation (QRPA) procedure is employed to perform calculations of the MGT2ν matrix elements for several ββ emitters. It is found that higher-order QRPA (HQRPA) corrections display a weak dependence on particle-particle (pp) strength gpp and, in the physical region (around gpp=1.0), they become important by comparison with QRPA predictions. It turns out that a further investigation of the HQRPA corrections could be illuminating to obtain more stable and reliable values for MGT2ν matrix elements in this region, where they are very sensitive to the pp strength.

  • Received 8 May 1992

DOI:https://doi.org/10.1103/PhysRevC.47.867

©1993 American Physical Society

Authors & Affiliations

S. Stoica

  • Institute of Atomic Physics, Bucharest, P.O. Box MG-6, Romania

W. A. Kaminski

  • Institute of Physics, M. Curie-Sklodowska University, PL-20-031 Lublin, Poland

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Issue

Vol. 47, Iss. 2 — February 1993

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