{"title":"A new measurement of 174Hf alpha decay","authors":"","doi":"10.1016/j.nuclphysa.2024.122976","DOIUrl":null,"url":null,"abstract":"<div><div>A new measurement of <sup>174</sup>Hf alpha decay to the ground state of <sup>170</sup>Yb was performed deep underground at the Gran Sasso National Laboratory (LNGS) of the INFN (Italy). The experimental data were accumulated over 97.7 days with a 16.87 g Cs<sub>2</sub>HfCl<sub>6</sub> single crystal. A new half-life value of <sup>174</sup>Hf <em>α</em> decay: T<sub>1/2</sub> = <span><math><mo>(</mo><msubsup><mrow><mn>3.8</mn></mrow><mrow><mo>−</mo><mn>0.9</mn></mrow><mrow><mo>+</mo><mn>1.7</mn></mrow></msubsup><mo>)</mo><mo>×</mo><msup><mrow><mn>10</mn></mrow><mrow><mn>16</mn></mrow></msup></math></span> yr, was evaluated. The total internal <em>α</em> activity of the crystal is 18.6(4) mBq/kg, and should be further improved, especially in terms of <sup>147</sup>Sm contamination (0.25 mBq/kg), in order to achieve a higher experimental sensitivity.</div></div>","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":null,"pages":null},"PeriodicalIF":1.7000,"publicationDate":"2024-10-28","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/S0375947424001581","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
A new measurement of 174Hf alpha decay to the ground state of 170Yb was performed deep underground at the Gran Sasso National Laboratory (LNGS) of the INFN (Italy). The experimental data were accumulated over 97.7 days with a 16.87 g Cs2HfCl6 single crystal. A new half-life value of 174Hf α decay: T1/2 = yr, was evaluated. The total internal α activity of the crystal is 18.6(4) mBq/kg, and should be further improved, especially in terms of 147Sm contamination (0.25 mBq/kg), in order to achieve a higher experimental sensitivity.
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.