Multi-Model Analysis of the Astrophysical S(E) Factor for the 9Be(p,α)6Li Reaction and Its Impact on Astrophysical Reaction Rates
Abstract
The 9Be(p,α)6Li reaction is a destruction process for 9Be in stars and the Big Bang. The Trojan Horse Method (THM) is a well-established indirect technique that enables the determination of reaction cross sections within the Gamow energy region while avoiding the uncertainties associated with low-energy extrapolations of the S(E) factor and electron-screening effects. In this work, the bare-nucleus THM data reported by Wen \textit{et al.} are systematically analyzed using polynomial fitting, a double Breit--Wigner model, and the R-matrix formalism. The applicability and physical implications of these theoretical approaches in describing the low-energy S(E) factor of the 9Be(p,α)6Li reaction are investigated and compared. Since the THM data have been incorporated into the NACRE II reaction-rate compilation, leading to improved accuracy in reaction-rate evaluations, the refined theoretical analysis presented here provides further insight into the underlying reaction dynamics and establishes a more reliable foundation for stellar reaction-rate calculations. The results obtained in this work offer valuable reference for future high-precision experimental investigations and the development of theoretical models in nuclear astrophysics.
Versions
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BibTeX
@misc{wang2026multimodel,
title = {{Multi-Model Analysis of the Astrophysical $S(E)$ Factor for the $^9\mathrmBe(p,α)^6\mathrmLi$ Reaction and Its Impact on Astrophysical Reaction Rates}},
author = {Xue-Jian Wang and Wei-Ke Nan and Qing Wang and Tian-Yu Tao and Qun-Gang Wen and Jian-You Guo and Cheng-Bo Li and Hui-Ming Jia},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.27403},
eprint = {2609.27403},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.27403},
note = {CC BY-NC-ND 4.0},
}
RIS
TY - UNPB
TI - Multi-Model Analysis of the Astrophysical S(E) Factor for the ^9Be(p,α)^6Li Reaction and Its Impact on Astrophysical Reaction Rates
AU - Xue-Jian Wang
AU - Wei-Ke Nan
AU - Qing Wang
AU - Tian-Yu Tao
AU - Qun-Gang Wen
AU - Jian-You Guo
AU - Cheng-Bo Li
AU - Hui-Ming Jia
PY - 2026
DA - 2026/09/23
PB - arXiv
DO - 10.48550/arxiv.2609.27403
UR - https://arxiv.org/abs/2609.27403
AB - The ^9Be(p,α)^6Li reaction is a destruction process for ^9Be in stars and the Big Bang. The Trojan Horse Method (THM) is a well-established indirect technique that enables the determination of reaction cross sections within the Gamow energy region while avoiding the uncertainties associated with low-energy extrapolations of the S(E) factor and electron-screening effects. In this work, the bare-nucleus THM data reported by Wen \textit{et al.} are systematically analyzed using polynomial fitting, a double Breit--Wigner model, and the R-matrix formalism. The applicability and physical implications of these theoretical approaches in describing the low-energy S(E) factor of the ^9Be(p,α)^6Li reaction are investigated and compared. Since the THM data have been incorporated into the NACRE II reaction-rate compilation, leading to improved accuracy in reaction-rate evaluations, the refined theoretical analysis presented here provides further insight into the underlying reaction dynamics and establishes a more reliable foundation for stellar reaction-rate calculations. The results obtained in this work offer valuable reference for future high-precision experimental investigations and the development of theoretical models in nuclear astrophysics.
ER -