能级对20 MeV以下\(n + ^{13}\) C反应双微分截面的影响

IF 2.6 3区 物理与天体物理 Q2 PHYSICS, NUCLEAR
Fanglei Zou, Xiaojun Sun, Jingshang Zhang, Xiaodong Sun, Xi Tao, Ruirui Xu, Kang Xing, Yongli Jin
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引用次数: 0

摘要

\(n + ^{13}\) C反应的核数据对描述核天体物理的演化、了解轻核的团簇结构以及放射性碳的产生具有重要意义。基于统一的hauser - feshach和激子模型,改进了轻核反应(STLN)的统计理论,以描述能级对\(n + ^{13}\) C反应中子和带电粒子双微分截面的影响。分析了靶核和不同残核各能级的贡献。计算结果与已有的中子出射双微分截面实验结果吻合较好。理论分析为\(^{13}\) c的可能能级的存在提供了证据。结果还表明,DWBA理论推导的直接非弹性散射和三体破裂反应的贡献应该被考虑在内。特别考虑了\(^{13}\) C第6能级(n, 2n)通道的贡献。对于在3-MeV出口能量范围附近观测到的8.09 MeV和8.24 MeV两个紧密间隔入射能量的显著差异的疑问已经澄清。此外,在\(n+^{13}\text {C}\)反应的任意出射角和入射能量下,出射质子、氘核、海同和\(\alpha \)的总双微分截面可以自一致地预测。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Effects of energy levels on the double-differential cross sections for \(n + ^{13}\)C reaction below 20 MeV

The nuclear data of \(n + ^{13}\)C reaction are very important in describing the evolution of nuclear astrophysics, understanding the cluster structure of light nuclei, and producting the radiocarbon. Based on the unified Hauser-Feshbach and exciton model, a statistical theory of light nucleus reaction (STLN) is improved to describe the effects of energy levels on the double-differential cross sections of neutron and charged particles for \(n + ^{13}\)C reaction. The individual contributions of every energy level of the target and different residual nuclei have been analysed. The calculated results agree well with all of the existing experimental double-differential cross sections of outgoing neutron. And the theoretical analysis provides an evidence for the existence of the possible levels of \(^{13}\)C. The results also indicate that the contributions of the direct inelastic scattering derived from DWBA theory and the three-body breakup reaction should be considered. Especially, the contributions of (n, 2n) channel of the 6-th energy level of \(^{13}\)C have been considered. The doubt regarding the significant discrepancies observed near 3-MeV exit energy range for two closely spaced incident energies of 8.09 MeV and 8.24 MeV has been clarified. Furthermore, the total double-differential cross sections of outgoing proton, deuteron, triton, and \(\alpha \) can be self-consistently predicted at arbitrary outgoing angles and incident energies for \(n+^{13}\text {C}\) reaction.

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来源期刊
The European Physical Journal A
The European Physical Journal A 物理-物理:核物理
CiteScore
5.00
自引率
18.50%
发文量
216
审稿时长
3-8 weeks
期刊介绍: Hadron Physics Hadron Structure Hadron Spectroscopy Hadronic and Electroweak Interactions of Hadrons Nonperturbative Approaches to QCD Phenomenological Approaches to Hadron Physics Nuclear and Quark Matter Heavy-Ion Collisions Phase Diagram of the Strong Interaction Hard Probes Quark-Gluon Plasma and Hadronic Matter Relativistic Transport and Hydrodynamics Compact Stars Nuclear Physics Nuclear Structure and Reactions Few-Body Systems Radioactive Beams Electroweak Interactions Nuclear Astrophysics Article Categories Letters (Open Access) Regular Articles New Tools and Techniques Reviews.
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