Nuclear matrix elements of ββ decay from β-decay data
نویسنده
چکیده
The evaluation of the nuclear matrix elements (NME) of the twoneutrino double beta (2νββ) decay and neutrinoless double beta (0νββ) decay using the proton-neutron quasiparticle random-phase approximation (pnQRPA) is addressed. In particular, the extraction of a proper value of the proton-neutron particle-particle interaction parameter, gpp, of this theory is analyzed in detail. Evidence is shown, that it can be misleading to use the experimental half-life of the 2νββ decay to extract a value for gpp. Rather, arguments are given in favour of using the available data on single beta decay for this purpose. PACS: 21.60.Jz; 23.40.Hc; 27.50.+e; 27.60.+j
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تاریخ انتشار 2008