Coupled channels analysis of 8He+4He scattering and resonant behaviour

IF 4.3 2区物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS

Physics Letters B Pub Date : 2024-08-12 DOI:10.1016/j.physletb.2024.138955

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引用次数: 0

Abstract

Previously measured elastic scattering and two-neutron transfer angular distributions for ⁸He scattered from a ⁴He target [Phys Lett. B 75, 58-62, 2017] are analysed using the coupled reaction channels (CRC) formalism and the effect of 1, 2 and 4-neutron transfers on both the elastic scattering and ⁶He + ⁶He channels is examined. The CRC calculations find that 1n and 2n transfers are the dominant processes in the production of ⁶He while the influence on the elastic scattering of 4n transfer between the ⁴He cores is small. Calculated excitation functions based on fits to both data sets suggest resonant-like behaviour centred at ¹²Be excitation energies of about 13 MeV and 14-16 MeV, both associated with the $L = 2$ and 4 partial waves and consistent with molecular structures in the intermediate ¹²Be system.

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8He+4He 散射和共振行为的耦合通道分析

利用耦合反应通道（CRC）形式分析了之前测量到的从4He靶散射的8He的弹性散射和双中子转移角分布[Phys Lett. B 75, 58-62，2017]，并考察了1、2和4中子转移对弹性散射和6He + 6He通道的影响。CRC 计算发现，1n 和 2n 转移是产生 6He 的主要过程，而 4He 核心之间的 4n 转移对弹性散射的影响很小。根据对两组数据的拟合计算出的激发函数表明，类似共振的行为集中在 12Be 激发能量约 13 MeV 和 14-16 MeV 处，两者都与 L=2 和 4 偏波有关，并与中间 12Be 系统的分子结构相一致。

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

Physics Letters B 物理-物理：综合

CiteScore

9.10

自引率

6.80%

发文量

647

审稿时长

3 months

期刊介绍： Physics Letters B ensures the rapid publication of important new results in particle physics, nuclear physics and cosmology. Specialized editors are responsible for contributions in experimental nuclear physics, theoretical nuclear physics, experimental high-energy physics, theoretical high-energy physics, and astrophysics.