Quasifree ( p , p N ) scattering of light neutron-rich nuclei near N = 14
Quasifree ( p , p N ) scattering of light neutron-rich nuclei near N = 14
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N = 14 附近轻中子富核的准自由 ( p , p N ) 散射
DOI：
10.1103/physrevc.97.024311
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发表时间：
2018
影响因子：
3.1
通讯作者：
Díaz Fernández P
中科院分区：
文献类型：
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作者：
Díaz Fernández P
背景：多年来，直接运动学中的准自由散射反应被广泛用于研究稳定核的结构，展示了这种方法的潜力。该合作机构已经进行了一项初步实验，以研究稳定光束的逆运动学中的准自由散射反应。该实验的结果构成了第一个逆运动学和完整运动学的准自由散射结果。这项技术最近已经扩展到奇异的束流，用于研究壳层结构的演化，这是因为当质子或中子的数目不同时，壳层结构的变化引起了人们的极大兴趣。目的：在本工作中，我们首次研究了同一射弹在逆运动学和完全运动学中同时发生的准自由散射反应()和()，目的是研究从到的单粒子性质的演化。方法：通过完全逆运动学中的()和()准自由击穿反应同时研究射弹的结构，从而可以同时研究质子和中子的结构。实验数据是在GSI的地面装置上收集的，束流能量约为400 MeV/u。为了揭示这些核的结构，我们研究了两个关键的观测参数：包含体截面和相应的动量分布。结论：放射性束流在逆运动学中的敲除反应()和()为壳层演化和结构的研究提供了重要的补充信息。对于()通道，已经观察到这些核的结构发生变化的迹象，即从壳层到壳层。这支持了之前的观察结果，即富中子氧同位素的亚壳层关闭，而氮同位素的亚壳层关闭。
Background:For many years, quasifree scattering reactions in direct kinematics have been extensively used to study the structure of stable nuclei, demonstrating the potential of this approach. Thecollaboration has performed a pilot experiment to study quasifree scattering reactions in inverse kinematics for a stablebeam. The results from that experiment constitute the first quasifree scattering results in inverse and complete kinematics. This technique has lately been extended to exotic beams to investigate the evolution of shell structure, which has attracted much interest due to changes in shell structure if the number of protons or neutrons is varied.Purpose:In this work we investigate for the first time the quasifree scattering reactions () and () simultaneously for the same projectile in inverse and complete kinematics for radioactive beams with the aim to study the evolution of single-particle properties fromto.Method:The structure of the projectiles, andhas been studied simultaneously via () and () quasifree knockout reactions in complete inverse kinematics, allowing the investigation of proton and neutron structure at the same time. The experimental data were collected at the-LAND setup at GSI at beam energies of around 400 MeV/u. Two key observables have been studied to shed light on the structure of those nuclei: the inclusive cross sections and the corresponding momentum distributions.Conclusions:The knockout reactions () and () with radioactive beams in inverse kinematics have provided important and complementary information for the study of shell evolution and structure. For the () channels, indications of a change in the structure of these nuclei moving fromtohave been observed, i.e., from theshell to the. This supports previous observations of a subshell closure atfor neutron-rich oxygen isotopes and its weakening for the nitrogen isotopes.