P. Belli, R. Bernabei, F. Cappella, V. Caracciolo, R. Cerulli, F. Danevich, A. Incicchitti, D. Kasperovych, V. Kobychev, G. Kovtun, N. G. Kovtun, M. Laubenstein, V. Merlo, D. Poda, O. Polischuk, A. P. Shcherban, S. Tessalina, V. Tretyak
{"title":"New experimental limits on double-beta decay of osmium","authors":"P. Belli, R. Bernabei, F. Cappella, V. Caracciolo, R. Cerulli, F. Danevich, A. Incicchitti, D. Kasperovych, V. Kobychev, G. Kovtun, N. G. Kovtun, M. Laubenstein, V. Merlo, D. Poda, O. Polischuk, A. P. Shcherban, S. Tessalina, V. Tretyak","doi":"10.1088/1361-6471/ac068a","DOIUrl":null,"url":null,"abstract":"Double-beta processes in 184Os and 192Os were searched for over 15 851 h at the Gran Sasso National Laboratory (LNGS) of the I.N.F.N. by using a 118 g ultra-pure osmium sample installed on the endcap of a 112 cm3 ultra-low- background broad-energy germanium detector. New limits on double-electron capture and electron capture with positron emission in 184Os were set at the level of lim T1/2 ∼ 10^16–10^17 years. In particular the 2ν2K and 2νKL decays of 184Os to the ground state of 184W are restricted as T1/2 > 3.0 × 10^16 years and T1/2 > 2.0 × 10^16 years, respectively. A lower limit on the half-life for the double-beta decay of 192Os to the first excited level of 192Pt was set as lim T1/2 = 2.0 × 10^20 years at 90% confidence level","PeriodicalId":16770,"journal":{"name":"Journal of Physics G","volume":"13 1","pages":"085104"},"PeriodicalIF":0.0000,"publicationDate":"2021-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"4","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Physics G","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1088/1361-6471/ac068a","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 4
Abstract
Double-beta processes in 184Os and 192Os were searched for over 15 851 h at the Gran Sasso National Laboratory (LNGS) of the I.N.F.N. by using a 118 g ultra-pure osmium sample installed on the endcap of a 112 cm3 ultra-low- background broad-energy germanium detector. New limits on double-electron capture and electron capture with positron emission in 184Os were set at the level of lim T1/2 ∼ 10^16–10^17 years. In particular the 2ν2K and 2νKL decays of 184Os to the ground state of 184W are restricted as T1/2 > 3.0 × 10^16 years and T1/2 > 2.0 × 10^16 years, respectively. A lower limit on the half-life for the double-beta decay of 192Os to the first excited level of 192Pt was set as lim T1/2 = 2.0 × 10^20 years at 90% confidence level
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