Two-neutrino doubleβdecay within fully renormalized quasiparticle random-phase approximation: Effect of the restoration of the Ikeda sum rule

L. Pacearescu, V. Rodin, F. Šimkovic, Amand Faessler
2003 Physical Review C  
The recently proposed Fully-Renormalized QRPA (FR-QRPA), which fullfils the Ikeda sum rule (ISR) exactly, is applied to the two-neutrino double beta decay of ^76Ge, ^82Se, ^100Mo, ^116Cd, ^128Te and ^130Xe. The results obtained are compared with those of other approaches, standard QRPA and self-consistent QRPA (SCQRPA). The similarities and the differences among the methods are discussed. The influence of the restoration of the Ikeda sum rule on the 2νββ-decay amplitude is analyzed.
doi:10.1103/physrevc.68.064310 fatcat:s7motv76y5af7hn7fm4knvljya