{"title":"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","authors":"Chun-Wang Ma, Yi-Jie Duan, Ya-Fei Guo, Chun-Yuan Qiao, Yu-Ting Wang, Jie Pu, Kai-Xuan Cheng, Hui-Ling Wei","doi":"10.1007/s41365-024-01455-9","DOIUrl":null,"url":null,"abstract":"<p>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 (<span>\\(\\delta _\\text {np}\\)</span>) of neutron-rich <span>\\(^{48}\\)</span>Ca was studied in the 140<i>A</i> MeV <span>\\(^{48}\\)</span>Ca + <span>\\(^{9}\\)</span>Be projectile fragmentation reaction based on the parallel momentum distribution (<span>\\(p_\\parallel \\)</span>) 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 (<span>\\(\\Gamma _\\text {L}\\)</span>) and the right side (<span>\\(\\Gamma _\\text {R}\\)</span>) in the distribution was used to describe the <span>\\(p_\\parallel \\)</span> of the residual fragments. Taking neutron-rich sulfur isotopes as examples, <span>\\(\\Gamma _\\text {L}\\)</span> shows a sensitive correlation with <span>\\(\\delta _\\text {np}\\)</span> of <span>\\(^{48}\\)</span>Ca, and is proposed as a probe for determining the neutron skin thickness of the projectile nucleus.</p>","PeriodicalId":19177,"journal":{"name":"Nuclear Science and Techniques","volume":"28 1","pages":""},"PeriodicalIF":3.6000,"publicationDate":"2024-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"A possible probe to neutron-skin thickness by fragment parallel momentum distribution in projectile fragmentation reactions\",\"authors\":\"Chun-Wang Ma, Yi-Jie Duan, Ya-Fei Guo, Chun-Yuan Qiao, Yu-Ting Wang, Jie Pu, Kai-Xuan Cheng, Hui-Ling Wei\",\"doi\":\"10.1007/s41365-024-01455-9\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>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 (<span>\\\\(\\\\delta _\\\\text {np}\\\\)</span>) of neutron-rich <span>\\\\(^{48}\\\\)</span>Ca was studied in the 140<i>A</i> MeV <span>\\\\(^{48}\\\\)</span>Ca + <span>\\\\(^{9}\\\\)</span>Be projectile fragmentation reaction based on the parallel momentum distribution (<span>\\\\(p_\\\\parallel \\\\)</span>) 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 (<span>\\\\(\\\\Gamma _\\\\text {L}\\\\)</span>) and the right side (<span>\\\\(\\\\Gamma _\\\\text {R}\\\\)</span>) in the distribution was used to describe the <span>\\\\(p_\\\\parallel \\\\)</span> of the residual fragments. Taking neutron-rich sulfur isotopes as examples, <span>\\\\(\\\\Gamma _\\\\text {L}\\\\)</span> shows a sensitive correlation with <span>\\\\(\\\\delta _\\\\text {np}\\\\)</span> of <span>\\\\(^{48}\\\\)</span>Ca, and is proposed as a probe for determining the neutron skin thickness of the projectile nucleus.</p>\",\"PeriodicalId\":19177,\"journal\":{\"name\":\"Nuclear Science and Techniques\",\"volume\":\"28 1\",\"pages\":\"\"},\"PeriodicalIF\":3.6000,\"publicationDate\":\"2024-06-18\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Nuclear Science and Techniques\",\"FirstCategoryId\":\"101\",\"ListUrlMain\":\"https://doi.org/10.1007/s41365-024-01455-9\",\"RegionNum\":1,\"RegionCategory\":\"物理与天体物理\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"NUCLEAR SCIENCE & TECHNOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Nuclear Science and Techniques","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.1007/s41365-024-01455-9","RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"NUCLEAR SCIENCE & TECHNOLOGY","Score":null,"Total":0}
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.
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.