Microscopic two-nucleon overlaps and knockout reactions from 12 C
Microscopic two-nucleon overlaps and knockout reactions from 12 C
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12 C 的微观双核重叠和敲除反应
DOI：
10.1103/physrevc.86.054609
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
J. Tostevin
中科院分区：
文献类型：
--
作者：
E. Simpson;P. Navr'atil;R. Roth;J. Tostevin
考虑了从快${}^{12}$C射弹束中去除一对相似或不相似核子的直接反应的核结构依赖性。具体地说，我们研究了两个核子的相关性和预测的去除截面的差异时，使用$p$壳壳模型和多$\ensuremath{\hbar}\ensuremath {\omega}$无核壳模型（NCSM）的两个核子重叠的过渡到质量$A=10$$抛射体残留物的描述。NCSM计算使用现代手征双核子和三核子（NN+3 N）相互作用。当采用NCSM双核子振幅时，到低态T=0$，${}^{10}$B末态的$np$-去除截面得到增强.计算的低能${}^{10}$B末态的绝对和相对部分截面对所用的相互作用表现出显著的敏感性，这表明，对这些跃迁的重叠函数的评估和对它们的结构的确认，可以利用对前向飞行射弹的np$-去除截面和相关动量分布的最终状态排他性测量来进行。比如残留物
The nuclear structure dependence of direct reactions that remove a pair of like or unlike nucleons from a fast ${}^{12}$C projectile beam are considered. Specifically, we study the differences in the two-nucleon correlations present and the predicted removal cross sections when using $p$-shell shell-model and multi-$\ensuremath{\hbar}\ensuremath{\omega}$ no-core shell-model (NCSM) descriptions of the two-nucleon overlaps for the transitions to the mass $A=10$ projectile residues. The NCSM calculations use modern chiral two-nucleon and three-nucleon (NN+3N) interactions. The $np$-removal cross sections to low-lying $T=0$, ${}^{10}$B final states are enhanced when using the NCSM two-nucleon amplitudes. The calculated absolute and relative partial cross sections to the low-energy ${}^{10}$B final states show a significant sensitivity to the interactions used, suggesting that assessments of the overlap functions for these transitions and confirmations of their structure could be made using final-state-exclusive measurements of the $np$-removal cross sections and the associated momentum distributions of the forward traveling projectile-like residues.