{"title":"Analysis of level structure and monopole effects in Ca isotopes","authors":"Jin Li, Ai-Xi Chen, Amir Jalili, Han-Kui Wang","doi":"10.1007/s41365-024-01555-6","DOIUrl":null,"url":null,"abstract":"<p>Understanding the properties of nuclei near the double magic nucleus <sup>40</sup>Ca is crucial for both nuclear theory and experiments. In this study, Ca isotopes were investigated using an extended pairing-plus-quadrupole model with monopole corrections. The negative-parity states of <sup>44</sup>Ca were coupled with the intruder orbital <span>\\(g_{9/2}\\)</span> at 4 MeV. The values of <span>\\(E_{4+}\\)</span>/<span>\\(E_{2+}\\)</span> agree well with experimental trend from <sup>42</sup>Ca to <sup>50</sup>Ca, considering monopole effects between <span>\\(\\nu f_{7/2}\\)</span> and <span>\\(\\nu p_{3/2}\\)</span>(<span>\\(\\nu f_{5/2}\\)</span>). This monopole effect, determined from data of <sup>48</sup>Ca and <sup>50</sup>Ca, supports the proposed new nuclear magic number <span>\\(N = 34\\)</span> by predicting a high-energy <span>\\(2^{+}\\)</span> state in <sup>54</sup>Ca.</p>","PeriodicalId":19177,"journal":{"name":"Nuclear Science and Techniques","volume":"23 1","pages":""},"PeriodicalIF":3.6000,"publicationDate":"2024-09-18","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/s41365-024-01555-6","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
Understanding the properties of nuclei near the double magic nucleus 40Ca is crucial for both nuclear theory and experiments. In this study, Ca isotopes were investigated using an extended pairing-plus-quadrupole model with monopole corrections. The negative-parity states of 44Ca were coupled with the intruder orbital \(g_{9/2}\) at 4 MeV. The values of \(E_{4+}\)/\(E_{2+}\) agree well with experimental trend from 42Ca to 50Ca, considering monopole effects between \(\nu f_{7/2}\) and \(\nu p_{3/2}\)(\(\nu f_{5/2}\)). This monopole effect, determined from data of 48Ca and 50Ca, supports the proposed new nuclear magic number \(N = 34\) by predicting a high-energy \(2^{+}\) state in 54Ca.
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.
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