Nuclear-structure aspects of the neutrinoless ββ -decays

Abstract

In this article, we analyze some nuclear-structure aspects of the 0ν double-beta decay nuclear matrix elements (NME). We give results for the decays of 48Ca , 76Ge , 82Se , 124Sn , 128Te , 130Te , and 136Xe , using improved effective interactions and valence spaces. We examine the dependence of the NMEs on the effective interaction and the valence space, and analyze the effects of the short-range correlations and the finite size of the nucleon. Finally, we study the influence of the deformation on the values of the NMEs.