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

Abstract

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.

25 pages, 12 figures, submitted to Physical Review C

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Cited by in corpus (9)

• Nuclear Equation of State from ground and collective excited state properties of nuclei
• Neutrino-nucleus reactions and their role for supernova dynamics and nucleosynthesis
• Feasibility of the finite amplitude method in covariant density functional theory
• Inelastic neutrino scattering off hot nuclei in supernova environments
• Nuclear Weak Rates and Nuclear Weak Processes in Stars
• Impact of cross-section uncertainties on supernova neutrino spectral parameter fitting in the Deep Underground Neutrino Experiment
• Hybrid method to resolve the neutrino mass hierarchy by supernova (anti)neutrino induced reactions
• Modeling nuclear weak-interaction processes with relativistic energy density functionals
• Neutrino-nucleus cross-sections at supernova neutrino energies