Probing surface distributions of alpha clusters in 20Ne via alpha-transfer reaction
Probing surface distributions of alpha clusters in 20Ne via alpha-transfer reaction
复制标题
通过 α 转移反应探测 20Ne 中 α 团簇的表面分布
DOI：
10.1103/physrevc.93.034606
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发表时间：
2016
影响因子：
3.1
通讯作者：
and Kazuyuki Ogata
中科院分区：
文献类型：
--
作者：
Tokuro Fukui;Yasutaka Taniguchi;Tadahiro Suhara;Yoshiko Kanada-En'yo;and Kazuyuki Ogata
背景：虽然人们已经进行了一些实验研究来提取团簇的信息，但还没有得到束缚态存在的直接证据。特别是在传统的反应分析中，在反应模型上存在一些重要的问题，不足以定性地讨论团簇结构。目的：我们的目的是从可观测数据来验证结构的表现。作为第一个应用，我们计划通过反应截面来提取原子核基态团簇结构的空间信息。方法：对于转移反应的分析，我们使用耦合通道Born近似(CCBA)方法，其中通过基于三体模型的连续介质离散耦合通道方法显式考虑了原子的分裂效应。用两种方法计算了和之间的重迭函数，一种是用生成元坐标方法建立的微观团簇模型(MCM)，另一种是唯象二体势模型(PM)。结果：用MCM波函数计算的CCBA对转移截面的角分布有很大的改进，与实验数据基本一致。利用PM方法，讨论了转移截面上团簇波函数的哪个区域。结论：团簇波函数的表面区对转移截面敏感。本工作是获得系统研究星系团结构的重要信息的第一步。
Background:Direct evidence of themanifestation in bound states has not been obtained yet, although a number of experimental studies were carried out to extract the information of the clustering. In particular in conventional analyses ofreactions, there exist a few significant problems on reaction models, which are insufficient to qualitatively discuss the cluster structure.Purpose:We aim to verify the manifestation of thestructure from observables. As the first application, we plan to extract the spatial information of the cluster structure of thenucleus in its ground state through the cross section of thereaction.Methods:For the analysis of the transfer reaction, we work with the coupled-channel Born approximation (CCBA) approach, in which the breakup effect ofis explicitly taken into account by means of the continuum-discretized coupled-channel method based on the three-bodymodel. The two methods are adopted to calculate the overlap function betweenand; one is the microscopic cluster model (MCM) with the generator coordinate method, and the other is the phenomenological two-body potential model (PM).Results:We show that the CCBA calculation with the MCM wave function gives a significant improvement of the theoretical result on the angular distribution of the transfer cross section, which is consistent with the experimental data. Employing the PM, it is discussed which region of the cluster wave function is probed on the transfer cross section.Conclusions:It is found that the surface region of the cluster wave function is sensitive to the cross section. The present work is situated as the first step in obtaining important information to systematically investigate the cluster structure.