s-Processing in Asymptotic Giant Branch Stars in the Light of Revised Neutron-Capture Cross Sections

被引：3

作者：

Vescovi, Diego ^{[1
]}

Reifarth, Rene ^{[1
]}

机构：

[1] Goethe Univ Frankfurt, Inst Appl Phys, Max von Laue Str 1, D-60438 Frankfurt, Germany

来源：

UNIVERSE | 2021年 / 7卷 / 07期

关键词：

nucleosynthesis; s-process; asymptotic giant branch stars; stellar abundances; nuclear reaction cross sections; chemically peculiar stars; circumstellar dust; LOW-MASS; SOLAR-SYSTEM; NUCLEOSYNTHESIS; EVOLUTION; C-13; MODELS; ORIGIN;

D O I：

10.3390/universe7070239

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Current AGB stellar models provide an adequate description of the s-process nucleosynthesis that occurs. Nonetheless, they still suffer from many uncertainties related to the modeling of the C-13 pocket formation and the adopted nuclear reaction rates. For many important s-process isotopes, a best set of neutron-capture cross sections was recently re-evaluated. Using stellar models prescribing that the C-13 pocket is a by-product of magnetic-buoyancy-induced mixing phenomena, s-process calculations were carried out with this database. Significant effects are found for a few s-only and branching point isotopes, pointing out the need for improved neutron-capture cross section measurements at low energy.

引用

页数：10

共 61 条

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