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0νββ nuclear matrix elements and the occupancy of individual orbits

Šimkovic, Fedor and Faessler, Amand and Vogel, Petr (2009) 0νββ nuclear matrix elements and the occupancy of individual orbits. Physical Review C, 79 (1). Art. No. 015502. ISSN 0556-2813. doi:10.1103/PhysRevC.79.015502.

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The measured occupancies of valence orbits in 76Ge and 76Se are used as a guideline for modification of the effective mean field energies that results in better description of these quantities. With them, in combination with the self-consistent renormalized quasiparticle random phase approximation (SRQRPA) method that ensures conservation of the mean particle number in the correlated ground state, we show that the resulting 0νββ nuclear matrix element for the 76Ge-->76Se transition is reduced by ~25% compared to the previous QRPA value, and therefore the difference between the present approach and the interacting shell model predictions becomes correspondingly smaller. Analogous modification of the mean field energies for the A=82 system also results in a reduction of 0νββ matrix element for the 82Se-->82Kr transition, making it also closer to the shell model prediction.

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Vogel, Petr0000-0003-0587-5466
Additional Information:© 2009 The American Physical Society. Received 1 December 2008; published 30 January 2009. We would like to thank Professor John Schiffer for numerous enlightening discussions. P.V. thanks the Institute for Nuclear Theory at the University of Washington for its hospitality during the work on this paper. We acknowledge also the support of the EU ILIAS project under Contract No. RII3-CT-2004-506222, the Deutsche Forschungsgemeinschaft (436 SLK 17/298), and of the VEGA Grant agency of the Slovak Republic under Contract No. 1/0249/03.
Funding AgencyGrant Number
European UnionRII3-CT-2004-506222
Deutsche Forschungsgemeinschaft (DFG)436 SLK 17/298
VEGA (Slovak Republic)1/0249/03
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Record Number:CaltechAUTHORS:SIMprc09
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ID Code:13168
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Deposited On:31 Jan 2009 00:36
Last Modified:08 Nov 2021 22:35

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