IFLP   13074
INSTITUTO DE FISICA LA PLATA
Unidad Ejecutora - UE
artículos
Título:
Single and double beta decays in the A = 100, A = 116 and A = 128 triplets of isobars
Autor/es:
J. SUHONEN; OSVALDO CIVITARESE
Revista:
NUCLEAR PHYSICS A
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Lugar: Amsterdam; Año: 2014 vol. 924 p. 1 - 23
ISSN:
0375-9474
Resumen:
In this paper we analyze the ground-state-to-ground-state two-neutrino double beta (2νββ) decays and single EC and β − decays for the A = 100 ( 100 Mo? 100 Tc? 100 Ru), A = 116 ( 116 Cd? 116 In? 116 Sn) and A = 128 ( 128 Te? 128 I? 128 Xe) triplets of isobars. We use the proton?neutron quasiparticle random-phase approximation (pnQRPA) with realistic G-matrix-derived effective interactions in very large single-particle bases. The purpose is to access the effective value of the axial-vector coupling constant g A in the pnQRPA calculations. We show that the three triplets of isobars represent systems with different characteristics of orbital occupancies and cumulative 2νββ nuclear matrix elements. Our analysis points to a considerably quenched averaged effective value of g A ≈ 0.6 ± 0.2 in the pnQRPA calculations.