Nuclear Theory
[Submitted on 9 Jun 2016 (v1), last revised 14 Nov 2016 (this version, v2)]
Title:Statistical analysis of beta decays and the effective value of g_A in the proton-neutron quasiparticle random-phase approximation framework
View PDFAbstract:We perform a Markov Chain Monte Carlo (MCMC) statistical analysis of a number of measured ground-state-to-ground-state single $\beta^+$/electron-capture and $\beta^-$ decays in the nuclear mass range A = 62 - 142. The corresponding experimental comparative half-lives (log ft 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 g_A in nuclear-structure calculations performed in the pnQRPA framework. As far as available, measured half-lives for two-neutrino double beta-minus decays occurring in the studied isobaric chains are analyzed as well.
Submission history
From: Frank Deppisch [view email][v1] Thu, 9 Jun 2016 10:58:50 UTC (1,132 KB)
[v2] Mon, 14 Nov 2016 16:17:13 UTC (1,132 KB)
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