A = 222等压线的核结构和衰变数据

IF 2.8 1区 物理与天体物理 Q2 PHYSICS, NUCLEAR
Balraj Singh , M.S. Basunia , Jun Chen , P. Dimitriou , B.M.S. Amro , S. Basu , S. Das , Diwanshu , A. Karmakar , M.J. Lazaric , S.R. Leblond , S.S. Nayak , C. Ngwetsheni , A. Rathi , P.S. Rawat , B. Rohila , V. Vallet
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引用次数: 0

摘要

给出了11种已知的A=222核素(Bi、Po、At、Rn、Fr、Ra、Ac、Th、Pa、U和Np)的评估数据,以及α-衰变到A=222核的A=226核的相关Jπ和T1/2数据。对于222Bi,只建立了同位素鉴定,没有测量其半衰期。对于222Po, 222At, 222Fr, 222U和222Np,只有基态的数据可用,具有静态磁偶极子和电四极矩,以及222Fr基态的电荷半径测量。对于222Ac和222Pa,已知226Pa α衰变和226Np衰变的两个低能级,但没有关于这些能级的Jπ分配和γ衰变的信息。对于222Pa,已知长寿命的同分异构体状态,主要由α衰变衰变。对222Rn、222Ra和222Th核进行了详细的研究,用α衰变研究了低自旋态,用束内γ射线研究了基态和八极带的高自旋态,用库仑激发研究了222Rn和222Ra核。通过222Fr的β−衰变也研究了222Ra的低自旋能级。已知激发态的半衰期为222Rn的7个能级,222Ra的12个能级,222Th的3个能级。在222Rn(16+)和(21−)、222Ra(20+)和(19−)、222Th(26+)和(25−)的交替奇偶带中均存在八极形变,并伴有带间E1跃迁。目前的评估取代了以前的A=222 ENSDF评估:(2011Si24), (1996El01), (1987El06)和(1977To14)。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Nuclear Structure and Decay Data for A = 222 Isobars

Evaluated data are presented for 11 known A=222 nuclides (Bi, Po, At, Rn, Fr, Ra, Ac, Th, Pa, U, and Np), and relevant Jπ and T1/2 data for A=226 nuclei decaying by α-decay to A=222 nuclei. For 222Bi, only the isotopic identification is established with no measurement of its half-life. For 222Po, 222At, 222Fr, 222U, and 222Np, data are available only for the ground states, with static magnetic dipole and electric quadrupole moments, and charge radius measurements for the 222Fr ground state. For 222Ac and 222Pa, two low-lying levels are known from 226Pa α decay, and 226Np decay, respectively, but with no information about Jπ assignments and γ decays of these levels. For 222Pa, a long-lived isomeric state is known, decaying dominantly by α decay. 222Rn, 222Ra, and 222Th have been investigated in detail, the low-spin states by α decay and the high-spin studies of ground-state and octupole bands by in-beam γ-ray studies for all the three nuclei, as well as by Coulomb excitation for 222Rn and 222Ra. Low-spin levels in 222Ra have been investigated also through the β decay of 222Fr. Half-lives of the excited states are known for 7 levels in 222Rn, 12 levels in 222Ra, and 3 levels in 222Th. Octupole deformations, with the presence of alternating-parity bands up to (16+) and (21) in 222Rn, (20+) and (19) in 222Ra, and (26+) and (25) in 222Th, and with interband E1 transitions, have been established in these three nuclei. The present evaluation supersedes the previous A=222 ENSDF evaluations: (2011Si24), (1996El01), (1987El06) and (1977To14).

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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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