DEFORMED SHELL MODEL RESULTS FOR TWO-NEUTRINO POSITRON DOUBLE BETA DECAY OF ⁸⁴Sr.

SAHU, R.; KOTA, V. K. B.

Half-lives $T_{1/2}^{2\nu}$ for two-neutrino positron double beta decay modes β EC/ECEC are calculated for 84Sr, a nucleus of current experimental interest, within the framework of the deformed shell model based on Hartree-Fock states employing a modified Kuo interaction in (2p3/2, 1f5/2, 2p1/2, 1g9/2) space. For a reasonable description of the spectra of 84Sr and 84Kr and to generate allowed GT strengths, the single particle energies of the proton and neutron 1g9/2 orbitals, relative to the 2p3/2 orbital energy, are chosen to be 3.5 MeV and 1.5 MeV for both 84Sr and 84Rb and 1.5 MeV and 1.5 MeV for 84Kr. With this, the calculated half-lives for the β EC and ECEC modes are ~1026yr and ~4×1024yr respectively.

NILSSON model; NEUTRINOS; POSITRONS; DOUBLE beta decay; STRONTIUM isotopes; HALF-life (Nuclear physics); PROTONS; NEUTRONS

International Journal of Modern Physics E: Nuclear Physics, 2011, Vol 20, Issue 8, p1723

0218-3013

Academic Journal

10.1142/S021830131101957X