Microscopic approach to 3He scattering
Microscopic approach to 3He scattering
复制标题
3He 散射的微观方法
DOI：
10.1103/physrevc.91.064610
复制
发表时间：
2015
期刊：
影响因子：
--
通讯作者：
Masanobu Yahiro
中科院分区：
文献类型：
--
作者：
Masakazu Toyokawa;Takuma Matsumoto;Kosho Minomo;Masanobu Yahiro
我们提出了一个描述弹性散射的实用折叠模型。在该模型中，通过两次折叠过程来构造光学势。首先通过用靶密度折叠墨尔本线阵和用Brieva-Rook方法局域化非局域折叠势来计算核子-靶势，然后用该密度折叠得到的局域核子-靶势。这种双单折叠模型很好地描述了入射能量在30-150 MeV/核子范围内的弹性散射，没有可调参数。研究发现，只有在较高的入射能量，如150 MeV/核子时，自旋-轨道力对微分截面的影响才可察觉。用连续介质离散化耦合通道方法研究了三核子的分裂效应，发现只有在40 MeV/核子附近的较低入射能量时才能观察到。文中还分析了敲击交换过程的影响。
We propose a practical folding model to describeelastic scattering. In the model,optical potentials are constructed by making the folding procedure twice. First the nucleon-target potential is evaluated by folding the Melbournematrix with the target density and localizing the nonlocal folding potential with the Brieva-Rook method, and second the resulting local nucleon-target potential is folded with thedensity. This double single-folding model well describeselastic scattering fromandtargets in a wide incident-energy range from 30 to 150 MeV/nucleon with no adjustable parameter. Spin-orbit force effects on differential cross sections are found to be appreciable only at higher incident energies such as 150 MeV/nucleon. Three-nucleon breakup effects ofare investigated with the continuum discretized coupled-channels method and are found to be appreciable only at lower incident energies around 40 MeV/nucleon. Effects of knock-on exchange processes are also analyzed.