Nuclear Data Sheets ( IF 2.8 ) Pub Date : 2021-07-13 , DOI: 10.1016/j.nds.2021.06.002 Balraj Singh 1 , Gopal Mukherjee 2 , S.K. Basu 2 , Srijit Bhattacharya 3 , Sudeb Bhattacharya 4 , A. Chakraborti 5 , A.K. De 6 , R. Gowrishankar 7 , A.K. Jain 8 , Sushil Kumar 9 , Sukhjeet Singh 9
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.
中文翻译:
A=219 的核数据表
提供了 12 种已知质量为 219 的核素(Pb、Bi、Po、At、Rn、Fr、Ra、Ac、Th、Pa、U、Np)的评估实验结构和衰变数据。给出了水平参数、γ和α辐射以及其他光谱信息的推荐值。在219 Bi、219 Po、219 Pa、219 U 和219 Np 中没有已知的激发态。除了同位素鉴定外,没有关于219 Pb的半衰期或衰变特征的信息。对于219 Po,从219 Bi β的衰变中报告了几种γ射线-衰减,但没有提出电平方案。对于219 At,从223 Fr 的α衰变中只知道四种激发态。对于219 Rn 和219 Fr,分别从223 Ra 和223 Ac 的α衰变中只知道低自旋态。对于219 Ra、219 Ac 和219 Th,主要是高自旋态的数据可从束内γ射线研究中获得。对于219Ra,可以从 2017He15、1992Wi02 和 1987Co36 获得高自旋数据,但评估人员发现三项研究之间的相对光子分支存在显着差异。在此核素的采用数据集中给出了详细的评论。激发态的半衰期仅在219 Rn 中的七个能级已知,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由 2001Br31、1992Br10 和 1977Ma30 发表的 A=219 评估中的数据。