Statistical analysis of β decays and the effective value of gA in the proton-neutron quasiparticle random-phase approximation framework

Frank F. Deppisch and Jouni Suhonen
Phys. Rev. C 94, 055501 – Published 11 November 2016

Abstract

We perform a Markov chain Monte Carlo (MCMC) statistical analysis of a number of measured ground-state-to-ground-state single β+/electron-capture and β decays in the nuclear mass range of A=62142. The corresponding experimental comparative half-lives (logft values) are compared with the theoretical ones obtained by the use of the proton-neutron quasiparticle random-phase approximation (pnQRPA) with G-matrix-based effective interactions. The MCMC analysis is performed separately for 47 isobaric triplets and 28 more extended isobaric chains of nuclei to extract values and uncertainties for the effective axial-vector coupling constant gA in nuclear-structure calculations performed in the pnQRPA framework. As far as available, measured half-lives for two-neutrino ββ decays occurring in the studied isobaric chains are analyzed as well.

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  • Received 16 June 2016

DOI:https://doi.org/10.1103/PhysRevC.94.055501

©2016 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

Authors & Affiliations

Frank F. Deppisch*

  • Department of Physics & Astronomy, University College London, London WC1E 6BT, United Kingdom

Jouni Suhonen

  • Department of Physics, University of Jyvaskyla, P.O. Box 35, FI-40014 Jyvaskyla, Finland

  • *f.deppisch@ucl.ac.uk
  • jouni.suhonen@phys.jyu.fi

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Issue

Vol. 94, Iss. 5 — November 2016

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