4.4 Article

Statistical Hauser-Feshbach Model Description of (n,α) Reaction Cross Sections for the Weak s-Process

期刊

UNIVERSE
卷 8, 期 1, 页码 -

出版社

MDPI
DOI: 10.3390/universe8010025

关键词

neutron induced reactions; alpha emission; Hauser-Feshbach model; s-process

资金

  1. QuantiXLie Centre of Excellence
  2. Croatian Government
  3. European Union
  4. Competitiveness and Cohesion Operational Programme [KK.01.1.1.01]
  5. Scientific and Technological Research Council of Turkey (TUBITAK) [1059B142000254]

向作者/读者索取更多资源

This study investigates the (n,alpha) reaction cross sections for weak s-process nucleosynthesis in stellar environment using a theoretical model. The results indicate the relevant energy ranges and call for novel experimental studies to reduce model uncertainties.
The (n,alpha) reaction contributes in many processes of energy generation and nucleosynthesis in stellar environment. Since experimental data are available for a limited number of nuclei and in restricted energy ranges, at present only theoretical studies can provide predictions for all astrophysically relevant (n,alpha) reaction cross sections. The purpose of this work is to study (n,alpha) reaction cross sections for a set of nuclei contributing in the weak s-process nucleosynthesis. Theory framework is based on the statistical Hauser-Feshbach model implemented in TALYS code with nuclear masses and level densities based on Skyrme energy density functional. In addition to the analysis of the properties of calculated (n,alpha) cross sections, the Maxwellian averaged cross sections are described and analyzed for the range of temperatures in stellar environment. Model calculations determined astrophysically relevant energy windows in which (n,alpha) reactions occur in stars. In order to reduce the uncertainties in modeling (n,alpha) reaction cross sections for the s-process, novel experimental studies are called for. Presented results on the effective energy windows for (n,alpha) reaction in weak s-process provide a guidance for the priority energy ranges in the future experimental studies.

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