Use of Global Predictions for Beta-Decay Rates in Astrophysical Models

The nucleosynthesis of heavy elements is calculated for two scenarios of neutron-star merger. Various global beta-decay models, including those based on the random-phase approximation (QRPA), relativistic quasiparticle RPA ( pn -RQRPA), and the finite-amplitude method (FAM), were employed in these c...

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Bibliographic Details
Published inPhysics of atomic nuclei Vol. 86; no. 2; pp. 173 - 180
Main Author Panov, I. V.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 01.04.2023
Springer
Springer Nature B.V
Subjects
Abundance
Astronomical models
Beta decay
Chemical elements
Decay rate
Elementary excitations
Heavy elements
Neutron stars
Nuclear fusion
NUCLEI/Theory
Particle and Nuclear Physics
Physics
Physics and Astronomy
Star mergers
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Summary:The nucleosynthesis of heavy elements is calculated for two scenarios of neutron-star merger. Various global beta-decay models, including those based on the random-phase approximation (QRPA), relativistic quasiparticle RPA ( pn -RQRPA), and the finite-amplitude method (FAM), were employed in these calculations. It is shown that the application of various global models in calculations of nucleosynthesis leads to the formation of a realistic structure of the curve of abundances of chemical elements. In contrast to nucleosynthesis in the scenario of merger of equal-mass neutron stars, the formation of elements in matter of the outer crust upon the explosion of a low-mass neutron star is weakly model-dependent in the region from the first to the second peak. However, the abundance of elements depends greatly on the beta-decay model in a strong r-process. No systematic effect of the beta-decay model on the results of nucleosynthesis is revealed.
ISSN:1063-7788
1562-692X
DOI:10.1134/S1063778823020163