Relativistic quasiparticle random-phase approximation calculation of total muon capture rates

Marketin, Tomislav and Paar, Nils and Nikšić, Tamara and Vretenar, Dario (2009) Relativistic quasiparticle random-phase approximation calculation of total muon capture rates. Physical Review C, 79 (5). pp. 54323-8. ISSN 0556-2813

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Abstract

The relativistic proton-neutron quasiparticle random phase approximation (pn-RQRPA) is applied in the calculation of total muon capture rates on a large set of nuclei from 12C to 244Pu, for which experimental values are available. The microscopic theoretical framework is based on the relativistic Hartree-Bogoliubov (RHB) model for the nuclear ground state, and transitions to excited states are calculated using the pn-RQRPA. The calculation is fully consistent, i.e., the same interactions are used both in the RHB equations that determine the quasiparticle basis, and in the matrix equations of the pn-RQRPA. The calculated capture rates are sensitive to the in-medium quenching of the axial-vector coupling constant. By reducing this constant from its free-nucleon value gA=1.262 by 10% for all multipole transitions, the calculation reproduces the experimental muon capture rates to better than 10% accuracy.

Item Type: Article
Date: May 2009
Subjects: NATURAL SCIENCES > Physics > Nuclear Physics
Additional Information: Copyright (2009) by the American Physical Society.
Divisions: Faculty of Science > Department of Physics
Project code: 119-1191005-1010
Publisher: American Physical Society
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 29 May 2014 20:13
Last Modified: 29 May 2014 20:13
URI: http://digre.pmf.unizg.hr/id/eprint/1969

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