Ingredients of nuclear matrix element for two-neutrino double-beta decay of 48Ca

Abstract

Large-scale shell model calculations including two major shells are carried out, and the ingredients of nuclear matrix element for two-neutrino double beta decay are investigated. Based on the comparison between the shell model calculations accounting only for one major shell ($pf$-shell) and those for two major shells ($sdpf$-shell), the effect due to the excitation across the two major shells is quantitatively evaluated.

To appear in J. Phys. Soc. Conf. Proc. (ARIS2014); for ver.2, Fig.1 is revised

References in corpus (3)

• Phase space factors for double-$\beta$ decay
• Shape transitions in exotic Si and S isotopes and tensor-force-driven Jahn-Teller effect
• Shell-model calculations of two-neutrino double-beta decay rates of ${}^{48}$Ca with GXPF1A interaction

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• One-neutron transfer reaction in the ${}^{18}$O + ${}^{48}$Ti collision at 275 MeV
• Towards Reliable Nuclear Matrix Elements for Neutrinoless $\beta \beta$ Decay