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.

中文翻译：

---

8He+4He 散射和谐振行为的耦合通道分析


使用耦合反应通道 （CRC） 形式分析了先前测量的从 4He 靶 [Phys Lett. B 75， 58-62， 2017] 散射的 8He 的弹性散射和双中子转移角度分布，并研究了 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，而对 4He 核之间 4n 转移的弹性散射的影响很小。基于两个数据集拟合的计算激励函数表明，以大约 13 MeV 和 14-16 MeV 的 12Be 激发能量为中心的类似共振的行为，两者都与 L=2 和 4 部分波相关，并且与中间 12Be 系统中的分子结构一致。