Effect of nucleon correlation in the 0νββ decay ofGe76andSe

Abstract

The nucleon correlation including the short range correlation and the nuclear core polarization has been investigated by using a diagrammatic efFective operator approach. The calculated results show that the contributions of the nucleon correlation to the OvPP decay of" Ge and Se are quite important, especially in the heavy-neutrino case.PACS number(s): 21.60. Cs, 21.30. +y, 23.40.8w, 27.50.+e

Influence of pairing in double beta decay of 48Ca

“…Recently, Bardin et al [21] gave the lower limit of (ββ) 2ν decay halflife measurement to be >3.6 × 10 19 yr and Balysh et al [22] [23,24]. Theoretically, the shell model [2,[25][26][27][28][29][30] is the natural calculation scheme for this nucleus without truncation. Recently proposed GXPF1A two-body effective interaction has been successfully tested for the fp shell [31][32][33] to perform 2νββ decay calculations for 48 Ca.…”