Investigation of α clustering with knockout reactions
Investigation of α clustering with knockout reactions
复制标题
通过敲除反应研究 α 聚类
DOI：
10.1103/physrevc.98.024614
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发表时间：
2018
影响因子：
3.1
通讯作者：
Kanada-En'yo Yoshiko
中科院分区：
文献类型：
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作者：
Yoshida Kazuki;Ogata Kazuyuki;Kanada-En'yo Yoshiko
背景：核团簇是核物理研究的热点之一。为了通过反应观测量来探测团簇，我们研究了转移反应和敲除反应。由于光谱因子不一定是成簇的直接量度，因此探测核表面的团簇振幅是非常重要的。目的：我们的目标是揭示如何通过敲除反应探测团簇振幅，这取决于反应条件，例如，方法：在扭曲波冲量近似（DWIA）框架下，计算了100-400 MeV的入射能量。我们引入了一个掩蔽函数，它表明了核内部反应振幅是如何被抑制的，并定义了团簇波函数的探测区域.结果：利用掩蔽函数清楚地表明，敲除反应探测了核表面区域的团簇振幅，这是发展良好的团簇态的直接量度.结论：由于掩蔽效应来源于畸变势的激发，通过选择合适的运动学参数，敲除反应可以探测核表面区域的团簇振幅，是研究团簇态空间发展的一种合适的方法。
Background: Nuclear clustering has been one of the main interests in nuclear physics. In order to probe theclustering through reaction observables,transfer andknockout reactions have been studied. It is very important to probe thecluster amplitude at nuclear surface since thespectroscopic factor is not necessarily a direct measure of theclustering.Purpose: Our goal is to reveal how thecluster amplitude is probed throughknockout reactions depending on reaction conditions, e.g., the incident energy.Method: We considerandat 100–400 MeV within the distorted wave impulse approximation (DWIA) framework. We introduce a masking function, which shows how the reaction amplitude in the nuclear interior is suppressed and defines the probed region of thecluster wave function.Results: It is clearly shown by means of the masking function that theknockout reaction probes thecluster amplitude in the nuclear surface region, which is the direct measure of well-developedcluster states. The incident energy dependence of the masking effect is investigated, using a simplified form of the masking function.Conclusions: Theknockout reaction can probe thecluster amplitude in the nuclear surface region by choosing proper kinematics owing to the masking effect originated from absorptions of distorting potentials, and is a suitable method to investigate howcluster states are spatially developed.