Imprints of α clustering in the density profiles of 12C and 16O
Imprints of α clustering in the density profiles of 12C and 16O
复制标题
12C 和 16O 密度分布中 α 簇的印记
DOI：
10.1103/physrevc.107.l021304
复制
发表时间：
2023
影响因子：
3.1
通讯作者：
Itagaki N.
中科院分区：
文献类型：
--
作者：
Horiuchi W.;Itagaki N.
原子核是一个紧密结合的、高度关联的四核子系统，它也以原子团的形式存在于核多体系统中。标准的单粒子壳层模型不能代表这些四体关联。人们非常希望找到一种简单的方法来识别和区分这些基本结构，而无需大规模的计算。在本文中，我们调查与内在的斯莱特决定因素作为审判的国家在多大程度上这两个竞争的图片占上风的基态和。试验态可以统一描述耦合壳模型和团簇构型。单体密度分布的试验状态的计算和弹性散射截面数据进行比较。试验状态的参数被选择为再现实验装药半径。一个发达的集群结构的特征在于通过增强的微分弹性散射截面，以及弹性电荷形状因子周围的第一个峰的位置。内部区域的密度分布也可以在超过第二最小值的更高动量传递区域进行探测。有了这些试验状态，人们可以直观而简单地想象团簇和壳结构之间的竞争。
Thenucleus is a well bound and highly correlated four-nucleon system that is also found in the form ofclusters as a substructure in nuclear many-body systems. The standard single-particle shell model cannot represent these four-body correlations. It is highly desirable to find a simple way to identify and distinguish these fundamental structures without large-scale computations. In this paper, we investigate with intrinsic Slater determinants as trial states in how far these two competing pictures prevail in the ground states ofand. The trial states can describe both thecoupling shell-model and-cluster configurations in a unified way. One-body density distributions of the trial states are calculated and compared to elastic scattering cross section data. The parameters of the trial state are chosen to reproduce the experimental charge radii. A well developed cluster structure is characterized by an enhancement of the differential elastic scattering cross sections, as well as the elastic charge form factors around the first peak positions. The density profiles of the internal regions can also be probed at higher momentum transfer regions beyond the second minimum. With these trial states one can visualize the competition between cluster and shell structure in an intuitive and simple way.