射弹碎裂反应中碎片平行动量分布对中子皮厚度的可能探测

IF 3.6 1区 物理与天体物理 Q1 NUCLEAR SCIENCE & TECHNOLOGY Nuclear Science and Techniques Pub Date : 2024-06-18 DOI:10.1007/s41365-024-01455-9
Chun-Wang Ma, Yi-Jie Duan, Ya-Fei Guo, Chun-Yuan Qiao, Yu-Ting Wang, Jie Pu, Kai-Xuan Cheng, Hui-Ling Wei
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引用次数: 0

摘要

中子皮厚度是富中子原子核的一个关键参数;然而,它却很难确定。在兰州量子分子动力学(LQMD)模型框架内,研究了140A MeV \(^{48}\)Ca + \(^{9}\)Be 射弹碎片反应中,基于残余碎片的平行动量分布((p_\\parallel \))对富中子\(^{48}\)Ca的中子皮厚度(()的可能探测。在 LQMD 模拟中,采用了费米型密度分布来启动中子密度分布。分布中左侧(\(\Gamma _\text {L}\)和右侧(\(\Gamma _\text {R}\)具有不同宽度参数的组合高斯函数被用来描述残余碎片的\(p_\parallel \)。以富含中子的硫同位素为例,\(\Gamma _\text {L}\)与\(^{48}\)Ca的\(\delta _\text {np}\)显示出灵敏的相关性,被建议作为确定射弹核中子皮厚的探针。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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A possible probe to neutron-skin thickness by fragment parallel momentum distribution in projectile fragmentation reactions

Neutron-skin thickness is a key parameter for a neutron-rich nucleus; however, it is difficult to determine. In the framework of the Lanzhou Quantum Molecular Dynamics (LQMD) model, a possible probe for the neutron-skin thickness (\(\delta _\text {np}\)) of neutron-rich \(^{48}\)Ca was studied in the 140A MeV \(^{48}\)Ca + \(^{9}\)Be projectile fragmentation reaction based on the parallel momentum distribution (\(p_\parallel \)) of the residual fragments. A Fermi-type density distribution was employed to initiate the neutron density distributions in the LQMD simulations. A combined Gaussian function with different width parameters for the left side (\(\Gamma _\text {L}\)) and the right side (\(\Gamma _\text {R}\)) in the distribution was used to describe the \(p_\parallel \) of the residual fragments. Taking neutron-rich sulfur isotopes as examples, \(\Gamma _\text {L}\) shows a sensitive correlation with \(\delta _\text {np}\) of \(^{48}\)Ca, and is proposed as a probe for determining the neutron skin thickness of the projectile nucleus.

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来源期刊
Nuclear Science and Techniques
Nuclear Science and Techniques 物理-核科学技术
CiteScore
5.10
自引率
39.30%
发文量
141
审稿时长
5 months
期刊介绍: Nuclear Science and Techniques (NST) reports scientific findings, technical advances and important results in the fields of nuclear science and techniques. The aim of this periodical is to stimulate cross-fertilization of knowledge among scientists and engineers working in the fields of nuclear research. Scope covers the following subjects: • Synchrotron radiation applications, beamline technology; • Accelerator, ray technology and applications; • Nuclear chemistry, radiochemistry, radiopharmaceuticals, nuclear medicine; • Nuclear electronics and instrumentation; • Nuclear physics and interdisciplinary research; • Nuclear energy science and engineering.
期刊最新文献
Properties of the phase diagram from the Nambu-Jona-Lasino model with a scalar-vector interaction In-beam gamma rays of CSNS Back-n characterized by black resonance filter Analysis of level structure and monopole effects in Ca isotopes Highly coupled off-resonance lattice design in diffraction-limited light sources Possibility of reaching the predicted center of the “island of stability” via the radioactive beam-induced fusion reactions
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