The 2νβ−β− decay rates within Pyatov's restoration method

Abstract

We try to give a detailed analysis of the 2????? decay rates to the final ground states for decay emitters: 70Zn, 80Se, 86Kr, 94Zr, 104Ru, 110Pd, 114Cd and 124Sn. The nucleon–nucleon residual interaction potential is defined according to Pyatov's restoration method. The nuclear matrix element for 2????? decay is obtained by including the virtual contributions coming from the isobar analogue excitations within the framework of proton–neutron quasi-particle random phase approximation (pnQRPA). The calculated decay rates are compared with mean field, schematic model and other calculations. © 2016 Elsevier B.V.