Systematic approach to β and 2vββ decays of mass A=100-136 nuclei
Pirinen, P., & Suhonen, J. (2015). Systematic approach to β and 2vββ decays of mass A=100-136 nuclei. Physical Review C, 91(5), Article 054309. https://doi.org/10.1103/PhysRevC.91.054309
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Physical Review CDate
2015Copyright
© 2015 American Physical Society. Published in this repository with the kind permission of the publisher.
In this work we perform a systematic study of pairs of single-β-decaying nuclei in the mass region A = 100–136
to extract information on the effective value of the axial-vector coupling constant gA. As the many-body framework
we use the quasiparticle random-phase approximation (QRPA) and its proton-neutron variant (pnQRPA) in singleparticle
valence bases with Woods-Saxon-calculated single-particle energies. It is found that, to a reasonable
approximation, gA is a linear function of the mass number A, with a slightly different parametrization below and
above the mass A = 121. Using the values of gA extracted from the linear fit, as well as an average constant value
of gA, we calculate the two-neutrino double-β (2νββ) decay half-lives of 11 β−β− decays and 10 mixed β+ and
electron-capture (EC) decays, β+β+/β+EC/ECEC, to both the ground state and the lowest three excited states.
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American Physical SocietyISSN Search the Publication Forum
0556-2813Keywords
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