Precise Half-Life Values for Two-Neutrino Double- β Decay: 2020 Review

摘要

All existing positive results on two-neutrino double beta decay and two-neutrino double electron capture in different nuclei have been analyzed. Weighted average and recommended half-life values for 48 Ca, 76 Ge, 82 Se, 96 Zr, 100 Mo, 100 Mo - 100 Ru (0 1 + ), 116 Cd, 128 Te, 130 Te, 136 Xe, 150 Nd, 150 Nd - 150 Sm (0 1 + ), 238 U, 78 Kr, 124 Xe and 130 Ba have been obtained. Given the measured half-life values, effective nuclear matrix elements for all these transitions were calculated.