Nuclear Structure Calculations for Two-Neutrino Double-β Decay

Figure 5

Nuclear matrix element for the decay of ⁷⁶Ge, ¹¹⁶Cd, ¹²⁸Te, ¹³⁰Te, and ¹⁵⁰Nd as a function of the coupling strength . Solid lines correspond to calculations with the energy denominator , while dashed lines correspond to . The gray area corresponds to the NME experimental range obtained from the measured half-lives using bare and quenched factors.