Large-scale calculations of supernova neutrino-induced reactions in Z=8–82 target nuclei

Paar, Nils and Tutman, H. and Marketin, Tomislav and Fischer, Tobias (2013) Large-scale calculations of supernova neutrino-induced reactions in Z=8–82 target nuclei. Physical Review C, 87 (2). pp. 25801-10. ISSN 0556-2813

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Background: In the environment of high neutrino fluxes provided in core-collapse supernovae or neutron star mergers, neutrino-induced reactions with nuclei contribute to the nucleosynthesis processes. A number of terrestrial neutrino detectors are based on inelastic neutrino-nucleus scattering and modeling of the respective cross sections allow predictions of the expected detector reaction rates. Purpose: To provide a self-consistent microscopic description of neutrino-nucleus cross sections involving a large pool of Z=8–82 nuclei for the implementation in models of nucleosynthesis and neutrino detector simulations. Methods: Self-consistent theory framework based on relativistic nuclear energy density functional is employed to determine the nuclear structure of the initial state and relevant transitions to excited states induced by neutrinos. The weak neutrino-nucleus interaction is employed in the current-current form and a complete set of transition operators is taken into account. Results: We perform large-scale calculations of charged-current neutrino-nucleus cross sections, including those averaged over supernova neutrino fluxes, for the set of even-even target nuclei from oxygen toward lead (Z=8–82), spanning N=8–182 (OPb pool). The model calculations include allowed and forbidden transitions up to J=5 multipoles. Conclusions: The present analysis shows that the self-consistent calculations result in considerable differences in comparison to previously reported cross sections, and for a large number of target nuclei the cross sections are enhanced. Revision in modeling r-process nucleosynthesis based on a self-consistent description of neutrino-induced reactions would allow an updated insight into the origin of elements in the Universe and it would provide the estimate of uncertainties in the calculated element abundance patterns.

Item Type: Article
Keywords: neutrino induced reactions, weak interaction, supernova
Date: February 2013
Subjects: NATURAL SCIENCES > Physics > Nuclear Physics
Additional Information: Copyright (2013) 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: 09 Jun 2014 10:45
Last Modified: 23 Feb 2016 15:28

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