arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1712.09079nucl-th
收藏

利用敲除反应研究$α$聚类

Investigation of $α$ clustering with knockout reactions

Kazuki Yoshida, Kazuyuki Ogata, Yoshiko Kanada-En'yo

摘要:

我们的目标是揭示如何通过$α$敲除反应探测$α$簇振幅,这取决于反应条件,例如,入射能量。在畸变波冲量近似(DWIA)框架下,考虑了100-400 MeV的$^{20}$ Ne($p$,$pα$)$^{16}$ O和$^{120}$ Sn($p$,$pα$)$^{116}$ Cd.我们引入了一个掩蔽函数,它显示了如何在核内部的反应振幅被抑制,并定义了探测区域的$α$集团波函数。通过掩蔽函数清楚地表明,$α$敲除反应探测核表面区域中的$α$簇振幅,这是发育良好的$α$簇状态的直接量度。引入了掩蔽函数的简化形式,并研究了掩蔽效应与入射能量的关系。由于扭曲势吸收产生的掩蔽效应,$α$敲除反应可以通过选择适当的运动学来探测核表面区域的$α$团簇振幅,是研究$α$团簇态空间发展的合适方法。

英文摘要:

Our goal is to reveal how the $α$ cluster amplitude is probed through $α$ knockout reactions depending on reaction conditions, e.g., the incident energy. We consider $^{20}$Ne($p$,$pα$)$^{16}$O and $^{120}$Sn($p$,$pα$)$^{116}$Cd at 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 the $α$ cluster wave function. It is clearly shown by means of the masking function that the $α$ knockout reaction probes the $α$ cluster amplitude in the nuclear surface region, which is the direct measure of well-developed $α$ cluster states. A simplified form of the masking function is introduced and the incident energy dependence of the masking effect is investigated. $α$ knockout reaction can probe the $α$ cluster 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 how $α$ cluster states are spatially developed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑