β decay of odd-A nuclei with the interacting boson-fermion model based on the Gogny energy density functional

The following article appeared in Physical Review C 101.2 (2020): 024311 and may be found at https://journals.aps.org/prc/pdf/10.1103/PhysRevC.101.024311The low-energy excitations and β decays of odd-A nuclei are studied within the interacting boson-fermion model (IBFM), based on the Gogny-D1M nuclear energy density functional (EDF). The constrained Hartree-Fock-Bogoliubov (HFB) approximation is employed to compute potential energy surfaces in terms of triaxial quadrupole degrees of freedom for even-even Xe and Ba nuclei in the mass A≈130 region. The mean field approximation also provides spherical single-particle energies and occupation probabilities for the neighboring odd-A nuclei. Those quantities represent a microscopic input for spectroscopic calculations in odd-A Xe, Ba, Cs and La isotopes. The Gamow-Teller (GT) and Fermi (F) transition matrix elements needed to compute β-decay log f t values are obtained without any phenomenological fitting. It is shown that both the low-lying states and β decays of the studied odd-A systems are described reasonably well within the employed theoretical frameworkThe work of K.N. is financed within the Tenure Track Pilot Programme of the Croatian Science Foundation and the École Polytechnique Fédérale de Lausanne, and the Project TTP-2018-07-3554 Exotic Nuclear Structure and Dynamics, with funds of the Croatian-Swiss Research Programme. The work of L.M.R. was supported by Spanish Ministry of Economy and Competitiveness (MINECO) Grant No. PGC2018-094583-B-I0