Study of Neutron Skin/Halo Structures Utilizing the Asymmetry in Nucleon Scatterings

利用核子散射不对称性研究中子皮/晕结构

• 批准号: 18540272
• 负责人: FUKUDA Mitsunori
• 金额: $ 2.47万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2006
• 资助国家: 日本
• 起止时间: 2006 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18540272/
• 关键词: Nucleon Density Distribution; Neutron Skin; Neutron Halo; Proton Halo; 原子核構造; Nucleon Density Distribution; Neutron Skin; Neutron Halo; Proton Halo; 原子核構造

From a systematic and precise measurement of reaction cross sections (σ_R), it has been revealed that σ_R at intermediate energies can be reproduced very well by an optical-limit Glauber calculation modified to include the multiple scattering and the Fermi-motion efficts. Based on this successful method to calculate σ_R, we tried to study the nuclear surface structure utilizing the high sensitivity of σ_R at these energies to dilute densities and also the asymmetry of nucleon scatterings. First, using 3H and 3He beams, precise σ_R data on heavy targets have been obtained to investigate the neutron skin Next, using polyethylene proton targets, the constituent (proton or neutron) of halo has been studied. As a result, comparing the present experimental data with the modified optical-limit calculations, the constituents of the halos in ^8B and ^<11>Be have been clearly shown., which shed a light on a way to understand the nuclear surface structure in detail.

从反应横截面（σ_R）的系统和精确测量中，可以通过修改的光学限制GLAUBER计算可以很好地复制中间能量的σ_R，以包括多个散射和Fermi-Motion效应。基于这种计算σ_R的成功方法，我们试图利用这些能量在这些能量上的高灵敏度来研究核表面结构，以稀释密度以及核子散射的不对称性。首先，使用3H和3HE束，已经获得了重型靶标的精确σ_R数据，以研究中性皮肤，使用聚乙烯质子靶标，Halo的组成（质子或中子）已研究。结果，已经清楚地显示了将当前的实验数据与修改的光学限制计算进行比较，在 ^8b和 ^<11>中的光环的成分。