{"title":"Beta decay properties of neutron-rich Co, Ni, Cu and Zn isotopes","authors":"Jameel-Un Nabi , Asim Ullah , Mureed Abbas Qammar","doi":"10.1016/j.nuclphysa.2025.123237","DOIUrl":null,"url":null,"abstract":"<div><div>Accurate and reliable assessments of the <em>β</em>-decay characteristics of neutron-rich nuclei are essential for gaining a deeper insight into the supernova explosions and related nucleosynthesis processes, including the <em>r</em>-process. We calculated the <em>β</em>-decay half-lives, Gamow-Teller distributions and branching ratios of neutron-rich cobalt, nickel and copper isotopes. Stellar weak interaction rates for a total of thirty-six neutron-rich nuclei (<sup>72−79</sup>Co, <sup>74−83</sup>Ni, <sup>78−86</sup>Cu and <sup>80−88</sup>Zn) were calculated using the proton-neutron quasi-particle random phase approximation (pn-QRPA) model. The computed half-lives are in better agreement with the measured data (having mean deviation of <span><math><mover><mrow><mi>r</mi></mrow><mrow><mo>¯</mo></mrow></mover></math></span> = 1.45) as compared to previous results. The stellar <em>β</em>-decay rates are bigger than the independent particle model rates at low temperature and density values. For high-temperature and high-density zones, the previous rates are up to an order of magnitude bigger than our results. The findings of the current investigation may prove useful for simulation of post-silicon burning evolution of stars and nucleosynthesis calculations.</div></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1064 ","pages":"Article 123237"},"PeriodicalIF":2.5000,"publicationDate":"2025-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Nuclear Physics A","FirstCategoryId":"101","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0375947425002234","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"PHYSICS, NUCLEAR","Score":null,"Total":0}
引用次数: 0
Abstract
Accurate and reliable assessments of the β-decay characteristics of neutron-rich nuclei are essential for gaining a deeper insight into the supernova explosions and related nucleosynthesis processes, including the r-process. We calculated the β-decay half-lives, Gamow-Teller distributions and branching ratios of neutron-rich cobalt, nickel and copper isotopes. Stellar weak interaction rates for a total of thirty-six neutron-rich nuclei (72−79Co, 74−83Ni, 78−86Cu and 80−88Zn) were calculated using the proton-neutron quasi-particle random phase approximation (pn-QRPA) model. The computed half-lives are in better agreement with the measured data (having mean deviation of = 1.45) as compared to previous results. The stellar β-decay rates are bigger than the independent particle model rates at low temperature and density values. For high-temperature and high-density zones, the previous rates are up to an order of magnitude bigger than our results. The findings of the current investigation may prove useful for simulation of post-silicon burning evolution of stars and nucleosynthesis calculations.
期刊介绍:
Nuclear Physics A focuses on the domain of nuclear and hadronic physics and includes the following subsections: Nuclear Structure and Dynamics; Intermediate and High Energy Heavy Ion Physics; Hadronic Physics; Electromagnetic and Weak Interactions; Nuclear Astrophysics. The emphasis is on original research papers. A number of carefully selected and reviewed conference proceedings are published as an integral part of the journal.