Analysis of the Astrophysical 30Si(n, γ)31Si Reaction via the Asymptotic Normalization Coefficient Method

IF 1.3 4区物理与天体物理 Q3 PHYSICS, MULTIDISCIPLINARY

JETP Letters Pub Date : 2025-07-25 DOI:10.1134/S0021364025605883

A. I. Kilic

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引用次数: 0

Abstract

This study investigates the ³⁰Si(n, γ)³¹Si astrophysical reaction using the asymptotic normalization coefficient (ANC) method. The squared neutron asymptotic normalization coefficients (ANCs), for the virtual decay ³¹Si \( \to \) ³⁰Si + n are extracted by reanalyzing the existing angular distributions of the ³⁰Si(d, p)³¹Si reaction at 12.5 MeV. Both the distorted wave born approximation (DWBA) and adiabatic distorted wave approximation (ADWA) models are applied to refine the analysis. The results show improved ANC values compared to previous DWBA calculations. The squared neutron asymptotic normalization coefficient (ANC), for the ground state is found to be (\(32.49 \pm 6\)) fm^–1 with DWBA and (\(31.45 \pm 6\)) fm^–1 with ADWA. Additionally, the direct capture (DC) reaction rate was calculated and compared with previous work. The results show good agreement with the literature, with minor deviations at higher temperatures, highlighting the importance of the DC process in the ³⁰Si(n, γ)³¹Si reaction. This work emphasizes the crucial role of neutron capture reactions in the formation of the weak \(s\)-process component in stars and provides new insights into reaction rates and cross sections.

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天体物理30Si(n, γ)31Si反应的渐近归一化系数法分析

本文采用渐近归一化系数（ANC）方法研究了30Si(n, γ)31Si的天体物理反应。通过重新分析在12.5 MeV下30Si(d, p)31Si反应的现有角分布，提取了虚拟衰变31Si \( \to \) 30Si + n的平方中子渐近归一化系数。采用畸变波玻恩近似（DWBA）和绝热畸变波近似（ADWA）模型对分析进行了细化。结果表明，与以前的DWBA计算相比，ANC值有所提高。得到基态中子渐近归一化系数（ANC）的平方，DWBA为（\(32.49 \pm 6\)） fm-1， ADWA为（\(31.45 \pm 6\)） fm-1。计算了直接俘获（DC）反应速率，并与前人的研究结果进行了比较。结果与文献一致，在较高温度下偏差较小，突出了直流过程在30Si(n, γ)31Si反应中的重要性。这项工作强调了中子捕获反应在恒星中形成弱\(s\)过程组分中的关键作用，并提供了对反应速率和截面的新见解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

JETP Letters 物理-物理：综合

CiteScore

2.40

自引率

30.80%

发文量

164

审稿时长

3-6 weeks

期刊介绍： All topics of experimental and theoretical physics including gravitation, field theory, elementary particles and nuclei, plasma, nonlinear phenomena, condensed matter, superconductivity, superfluidity, lasers, and surfaces.