Nuclear Data Sheets for A=219

IF 2.8 1区 物理与天体物理 Q2 PHYSICS, NUCLEAR
Balraj Singh , Gopal Mukherjee , S.K. Basu , Srijit Bhattacharya , Sudeb Bhattacharya , A. Chakraborti , A.K. De , R. Gowrishankar , A.K. Jain , Sushil Kumar , Sukhjeet Singh
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引用次数: 4

Abstract

Evaluated experimental structure and decay data are presented for 12 known nuclides of mass 219 (Pb, Bi, Po, At, Rn, Fr, Ra, Ac, Th, Pa, U, Np). Recommended values are given for level parameters, γ and α radiations, and other spectroscopic information. No excited states are known in 219Bi, 219Po, 219Pa, 219U and 219Np. Except for isotopic identification, no information about its half-life or decay characteristics is available for 219Pb. For 219Po, several γ rays have been reported from the decay of 219Bi β decay, but no level scheme has been proposed. For 219At, only four excited states are known from α decay of 223Fr. For 219Rn and 219Fr, only the low-spin states are known from α decays of 223Ra and 223Ac, respectively. For 219Ra, 219Ac and 219Th, mainly the data for high-spin states are available from in-beam γ-ray studies. For 219Ra, high-spin data are available from 2017He15, 1992Wi02 and 1987Co36, but evaluators find significant differences in relative photon branchings between the three studies. Detailed comments are given in the Adopted dataset for this nuclide. Half-lives of excited states are known only for seven levels in 219Rn, thus there is a general lack of knowledge about γ-ray transition probabilities. This work supersedes data in the previous evaluations of A=219 published by 2001Br31, 1992Br10 and 1977Ma30.

核数据表A=219
对12种已知质量为219的核素(Pb、Bi、Po、At、Rn、Fr、Ra、Ac、Th、Pa、U、Np)的实验结构和衰变数据进行了评估。给出了能级参数、γ和α辐射以及其他光谱信息的推荐值。219Bi、219Po、219Pa、219U和219Np中没有已知激发态。除了同位素鉴定外,没有关于219Pb半衰期或衰变特性的信息。对于219Po,已经报道了一些来自219Bi β−衰变的γ射线,但没有提出能级方案。对于219At,从223Fr的α衰变中只知道四个激发态。对于219Rn和219Fr,分别只从223Ra和223Ac的α衰变中知道低自旋态。对于219Ra、219Ac和219,高自旋态的数据主要来自束内γ射线的研究。对于219Ra,可以从2017He15, 1992Wi02和1987Co36获得高自旋数据,但评估者发现三个研究之间的相对光子分支存在显着差异。该核素的采用数据集给出了详细的评论。在219Rn中,已知激发态的半衰期只有7个能级,因此普遍缺乏关于γ射线跃迁概率的知识。这项工作取代了先前在2001Br31、1992Br10和1977Ma30发表的A=219评价中的数据。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Nuclear Data Sheets
Nuclear Data Sheets 物理-物理:核物理
CiteScore
7.80
自引率
5.40%
发文量
22
审稿时长
>12 weeks
期刊介绍: The Nuclear Data Sheets are current and are published monthly. They are devoted to compilation and evaluations of experimental and theoretical results in Nuclear Physics. The journal is mostly produced from Evaluated Nuclear Structure Data File (ENSDF), a computer file maintained by the US National Nuclear Data Center
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