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arXiv 2006.00722nucl-thnucl-ex
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准氘区$α$团簇轻核光子衰变的双质子动量关联

Two-proton momentum correlation from photondisintegration of $α$-clustering light nuclei in the quasi-deuteron region

B. S. Huang, Y. G. Ma

摘要:

在扩展的量子分子动力学模型框架下,利用准氘核区的$^{12}$ C和$^{16}$ O靶,在三体光衰变通道中构造了质子-质子动量关联函数.利用Lednicky和Lyuboshitz(LL)的动量关联函数公式,得到了具有不同初始几何结构的$^{12}$ C和$^{16}$ O靶的特定三体光子衰变通道的质子-质子动量关联函数,并提取了质子-质子对各自的发射源尺寸.结果表明,在光核反应中建立质子-质子动量关联是可行的,并且对初始原子核结构敏感。对于未来的实验研究调查轻核的$α$ -集群结构,目前的工作可以用来阐明($γ$,pp)或(e,$e'$ pp)反应的性能和关联函数分析。

英文摘要:

The proton-proton momentum correlation function is constructed in three-body photo-disintegration channels from $^{12}$C and $^{16}$O targets in the quasi-deuteron regime within the framework of an extended quantum molecular dynamics model. Using the formula of Lednicky and Lyuboshitz (LL) for the momentum correlation function, we obtain a proton-proton momentum correlation function for the specific three-body photon-disintegration channels of $^{12}$C and $^{16}$O targets, which are assumed to have different initial geometric structures, and extract their respective emission source sizes for the proton-proton pair. The results demonstrate that constructing a proton-proton momentum correlation is feasible in photo-nuclear reactions, and it is sensitive to the initial nuclear structure. For future experimental studies investigating the $α$-clustering structures of light nuclei, the present work can be used to shed light on the performance and correlation function analysis of ($γ$,pp) or (e,$e'$pp) reactions.

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