Precise Half-Life Values for Two-Neutrino Double-<i>β</i> Decay: 2020 Review

Abstract

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 48Ca, 76Ge, 82Se, 96Zr, 100Mo, 100Mo - 100Ru (01+), 116Cd, 128Te, 130Te, 136Xe, 150Nd, 150Nd - 150Sm (01+), 238U, 78Kr, 124Xe and 130Ba have been obtained. Given the measured half-life values, effective nuclear matrix elements for all these transitions were calculated.

Keywords

• double beta decay
• nuclear matrix elements
• ⁴⁸Ca
• ⁷⁶Ge
• ⁸²Se
• ⁹⁶Zr