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

作者：Sahu R^*; Kota V K B

来源：International Journal of Modern Physics E-Nuclear Physics, 2011, 20(8): 1723-1733.

DOI：10.1142/S021830131101957X

• Positron double beta decay
• deformed shell model
• two-neutrino beta(+)beta(+)/beta+EC/ECEC decay modes
• half lives
• Sr-84

Half-lives T-1/22(nu), for two-neutrino positron double beta decay modes beta+EC/ECEC are calculated for Sr-84, a nucleus of current experimental interest, within the framework of the deformed shell model based on Hartree-Pock states employing a modified Kilo interaction in ((2)p(3/2), (1)f(5/2), (2)p(1/2), (1)g(9/2)) space. For a reasonable description of the spectra of Sr-84 and Kr-84 and to generate allowed GT strengths, the single particle energies of the proton and neutron (1)(gg/2), orbitals, relative to the (2)p(3/2) orbital energy, are chosen to be 3.5 MeV and 1.5 MeV for both Sr-84 and Rb-84 and 1.5 MeV and 1.5 MeV for Kr-84. With this the calculated half-lives for the beta+EC and ECEC modes are similar to 10(26) yr and similar to 4 x 10(24) yr respectively.

• 出版日期2011-8