{"title":"Structure and 2p decay mechanism of 18Mg","authors":"Long Zhou, De-Qing Fang, Si-Min Wang, Hui Hua","doi":"10.1007/s41365-024-01479-1","DOIUrl":null,"url":null,"abstract":"<p>The recently discovered, extremely proton-rich nuclide <span>\\(^{18}\\)</span>Mg exhibits ground-state decay via two sequential two-proton (2p) emissions through the intermediate nucleus, <span>\\(^{16}\\)</span>Ne. This study investigates the structure and the initial 2p decay mechanism of <span>\\(^{18}\\textrm{Mg}\\)</span> by examining the density and correlations of the valence protons using a three-body Gamow coupled-channel method. The results show that the ground state of <span>\\(^{18}\\textrm{Mg}\\)</span> is significantly influenced by the continuum, resulting in a significant <i>s</i>-wave component. However, based on the current framework, this does not lead to a significant deviation in mirror symmetry in either the structure or spectroscopy of the <span>\\(^{18}\\textrm{Mg}\\)</span>–<span>\\(^{18}\\textrm{C}\\)</span> pair. Additionally, the time evolution analysis of the <span>\\(^{18}\\textrm{Mg}\\)</span> ground state suggests a simultaneous 2p emission during the first step of decay. The observed nucleon–nucleon correlations align with those of the light-mass 2p emitters, indicating a consistent decay behavior within this nuclear region.</p>","PeriodicalId":19177,"journal":{"name":"Nuclear Science and Techniques","volume":null,"pages":null},"PeriodicalIF":3.6000,"publicationDate":"2024-06-26","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/s41365-024-01479-1","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}
引用次数: 0
Abstract
The recently discovered, extremely proton-rich nuclide \(^{18}\)Mg exhibits ground-state decay via two sequential two-proton (2p) emissions through the intermediate nucleus, \(^{16}\)Ne. This study investigates the structure and the initial 2p decay mechanism of \(^{18}\textrm{Mg}\) by examining the density and correlations of the valence protons using a three-body Gamow coupled-channel method. The results show that the ground state of \(^{18}\textrm{Mg}\) is significantly influenced by the continuum, resulting in a significant s-wave component. However, based on the current framework, this does not lead to a significant deviation in mirror symmetry in either the structure or spectroscopy of the \(^{18}\textrm{Mg}\)–\(^{18}\textrm{C}\) pair. Additionally, the time evolution analysis of the \(^{18}\textrm{Mg}\) ground state suggests a simultaneous 2p emission during the first step of decay. The observed nucleon–nucleon correlations align with those of the light-mass 2p emitters, indicating a consistent decay behavior within this nuclear region.
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.