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Nucleosynthesis-Rate Dependence of Abundances of Nuclei Produced in the r-Process

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Abstract

The rate of neutron-induced nucleosynthesis of heavy nuclei is determined by the astrophysical scenario and by the rate of beta decay of nuclei involved in the r-process. The effect of beta-decay rates calculated within various theoretical models on the abundances of heavy nuclei is analyzed on the basis of the yields of heavy nuclei in the r-process and the determination of their sensitivity to input data. It is shown that a sizable change in the r-process rate has a strong effect on the process of formation of the third peak in the abundance curve and on the size and position of this peak.

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Funding

This work was supported by Russian Foundation of Basic Research, grant no. 18-29-21019 mk for calculations of beta-decay rates and abundances of heavy nuclei; and grant no. 18-02-00670 for calculations of the beta-decay strength function \(S(E)\) for a number of nuclei with allowance for the resonance structure.

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Authors and Affiliations

  1. Institute for Theoretical and Experimental Physics, National Research Center Kurchatov Institute, 117218, Moscow, Russia

    I. V. Panov

  2. National Research Center Kurchatov Institute, 123182, Moscow, Russia

    I. V. Panov & Yu. S. Lutostansky

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  1. I. V. Panov
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  2. Yu. S. Lutostansky
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Correspondence to I. V. Panov.

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Panov, I.V., Lutostansky, Y.S. Nucleosynthesis-Rate Dependence of Abundances of Nuclei Produced in the r-Process. Phys. Atom. Nuclei 83, 613–620 (2020). https://doi.org/10.1134/S1063778820040171

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