The nuclear matrix elements M0ν of the neutrinoless double-beta decay ( 0νββ ) are evaluated for 76 Ge , 100 Mo , 130 Te , and 136 Xe within the renormalized quasiparticle random phase approximation (RQRPA) and the simple QRPA. Three sets of single particle level schemes are used, ranging in size from 9 to 23 orbits. When the strength of the particle-particle interaction is adjusted so that the 2νββ decay rate is correctly reproduced, the resulting M0ν values become essentially independent of the size of the basis, and of the form of different realistic nucleon-nucleon potentials. Thus, one of the main reasons for variability of the calculated M0ν within these methods is eliminated.
Physical Review C
- Pub Date:
- October 2003
- Relation with nuclear matrix elements and nuclear structure;
- Nuclear structure models and methods;
- Nuclear Theory
- 5 pages, 2 figures