Revised Reaction Rate for the Astrophysical Reaction 18O(p, α)15N via a Global R-matrix Analysis

被引：0
|
作者：
Li, Yi-Yang [1 ,2 ]
Hu, Jun [1 ,2 ]
Ru, Long-Hui [1 ]
Tian, Ning [1 ,2 ,3 ]
Lv, Jin-Feng [3 ]
机构：
[1] Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China
[2] Univ Chinese Acad Sci, Sch Nucl Sci & Technol, Beijing 100049, Peoples R China
[3] Lanzhou Univ, Sch Nucl Sci & Technol, Lanzhou 730000, Peoples R China
来源：
ASTROPHYSICAL JOURNAL | 2024年 / 973卷 / 02期
基金：
中国国家自然科学基金; 国家重点研发计划;
关键词：
ASYMPTOTIC GIANT BRANCH; ELASTIC-SCATTERING; O-18(P; ALPHA)N-15; REACTION; ENERGY-LEVELS; PROTONS;
D O I：
10.3847/1538-4357/ad66d0
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The O-18(p, alpha)N-15 reaction is of particular importance for influencing the abundances of key isotopes such as F-19, O-18, and N-15. Peculiar abundances for these nuclei are observed from spectra or meteorite grains originating in asymptotic giant branch stars. The O-18(p, alpha)N-15 could provide a way to explain the discrepancy between the observations and model predictions. A comprehensive R-matrix analysis has been performed for the O-18(p, alpha)N-15 reaction by including additional constraints from other reaction channels; in particular, the N-15+alpha scattering data were involved in the analysis for the first time. All available data were compiled and used in the R-matrix analysis. The fitted resonance parameters are compared with previous works. A revised determination of reaction rate has been extracted, relying on the present fitting parameters. The uncertainties on the corresponding reaction rates were then obtained by a Monte Carlo analysis.
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页数：9
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