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Nuclear Structure and Decay Data for A=33 Isobars

IF 2.8 1区物理与天体物理 Q2 PHYSICS, NUCLEAR

Nuclear Data Sheets

Pub Date : 2025-02-01 DOI: 10.1016/j.nds.2025.01.001

Jun Chen , Balraj Singh

Experimental structure and decay data are evaluated for eight known nuclides of mass number A=33 (Na, Mg, Al, Si, P, S, Cl, Ar). Experimental studies for the identification of other three nuclides: ³³F, ³³Ne and ³³K by 2019Ah07, 2007Ba71, and 1986La17, respectively, have not met with success, and values of S(2n) for ³³F, S(n) for ³³Ne and S(p) for ³³K from systematics (2021Wa16) and theoretical calculations (2019Mo01) suggest that these nuclei are likely unbound towards particle emission. Detailed evaluated level properties and related information are presented and recommended spectroscopic parameters are provided, combining all the data from various reactions and decays. Information for excited states in ³³Na is limited and the spin of ³³Al g.s. still has not been determined unambiguously. The radioactive decay schemes of ³³Na, ³³Mg, ³³Al and ³³Si remain incomplete. The ³³S nuclide is the most extensively studied from many different reactions and decays, followed by ³³Cl and ³³P. This work supersedes earlier full evaluations of A=33 published by 2011Ch49, 1990En08 (also 1998En04 update) and 1978En02.

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引用次数: 0

General Policies

IF 2.8 1区物理与天体物理 Q2 PHYSICS, NUCLEAR

Nuclear Data Sheets

Pub Date : 2025-02-01 DOI: 10.1016/j.nds.2025.01.003

引用次数: 0

Nuclear Data Sheets for A=81

IF 2.8 1区物理与天体物理 Q2 PHYSICS, NUCLEAR

Nuclear Data Sheets

Pub Date : 2025-02-01 DOI: 10.1016/j.nds.2025.01.002

M. Shamsuzzoha Basunia

Nuclear structure data pertaining to all nuclei with mass number A=81 (Ni, Cu, Zn, Ga, Ge, As, Se, Br, Kr, Rb, Sr, Y, Zr, Nb, Mo) have been compiled and evaluated and incorporated into the ENSDF data file. This evaluation for A=81 supersedes the previous one, 2008Ba34.

Highlights of this evaluation are the following:

From fragmentation reaction studies of ²³⁸U beam at 345 MeV/nucleon on a Be target, one count has been assigned to ⁸¹Ni in 2017Su15, which is assumed to correspond to the g.s. activity of ⁸¹Ni and the Adopted Levels dataset has been proposed.

The absolute Iγ determined in 1982De36 (⁸¹Y ε decay (70.4 s)) from total Iγ/total β⁺ recoils implies a 97% g.s. branch (from (5/2⁺) to 1/2⁻) in the ⁸¹Y ε decay, which is discrepant compared to the g.s. feeding of <2.6 in this evaluation. The absolute Iγ of 1982De36 was not considered in the previous evaluation (2008Ba34), same in this one as well. The reason for this major discrepancy is not understood. The decay scheme normalization is consequently tentative.

⁸¹Zr g.s. half-life measurements have been reported from (113, 175, and 230γ(t)) and decay curves for β events correlated with ⁸¹Zr implantations. No additional data are available. A ⁸¹Zr ε decay (5.3 s) dataset has been created based on the data from the Adopted Levels, Gammas of ⁸¹Y.

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Nuclear Data Sheets Symbols and Abbreviations

IF 2.8 1区物理与天体物理 Q2 PHYSICS, NUCLEAR

Nuclear Data Sheets

Pub Date : 2025-02-01 DOI: 10.1016/S0090-3752(25)00008-0

引用次数: 0

Nuclear Data Sheets Symbols and Abbreviations 核数据表符号和缩写

IF 2.8 1区物理与天体物理 Q2 PHYSICS, NUCLEAR

Nuclear Data Sheets

Pub Date : 2024-12-01 DOI: 10.1016/S0090-3752(24)00068-1

引用次数: 0

Energy Levels of Light Nuclei A=13 轻核的能级A=13

IF 2.8 1区物理与天体物理 Q2 PHYSICS, NUCLEAR

Nuclear Data Sheets

Pub Date : 2024-12-01 DOI: 10.1016/j.nds.2024.11.001

J.H. Kelley , C.G. Sheu , J.E. Purcell

Experimental nuclear spectroscopic data are evaluated for the 7 known nuclides of mass 13 (Li, Be, B, C, N, O, F). Detailed information is compiled and presented for each reaction and decay experiment. The results are combined and used to provide a set of recommended values that include level energies, spins and parities, half-lives of levels, decay branching ratios, and other nuclear properties. This work supersedes the earlier work by Fay Ajzenberg-Selove (1990Aj01) published in Nuclear Physics A 523 (1991) 1. Earlier reviews were published in (1986Aj01, 1981Aj01, 1976Aj04, 1970Aj04, 1959Aj76).

对质量为13的7种已知核素（Li, Be， B， C， N， O， F）的实验核光谱数据进行了评估。对每个反应和衰变实验进行了详细的汇编和介绍。这些结果被结合起来，用来提供一组推荐值，包括能级能量、自旋和奇偶、能级的半衰期、衰变分支比和其他核性质。这项工作取代了Fay Ajzenberg-Selove （1990Aj01）在核物理A 523(1991) 1上发表的早期工作。早期的评论发表于（1986Aj01, 1981Aj01, 1976Aj04, 1970Aj04, 1959Aj76）。

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Nuclear Data Sheets for A=246 核数据表A=246

IF 2.8 1区物理与天体物理 Q2 PHYSICS, NUCLEAR

Nuclear Data Sheets

Pub Date : 2024-12-01 DOI: 10.1016/j.nds.2024.11.002

C.D. Nesaraja

Available information pertaining to the nuclear structure of ground and excited states for all known nuclei with mass number

A = 246

have been compiled and evaluated. The adopted level and decay schemes, as well as the detailed nuclear properties and configuration assignments based on experimental data, are presented for these nuclides. When there are insufficient data, expected values from systematics of nuclear properties and/or theoretical calculations are utilized. Unexpected or discrepant experimental results are also noted. In cases where weighted averaging procedures have been used, the assigned uncertainty in the result is generally not lower than the lowest uncertainty in the data points used in the procedure.

所有已知质量数为A=246的原子核的基态和激发态核结构的现有资料已经汇编和评估。给出了这些核素所采用的能级和衰变方案，以及基于实验数据的详细核性质和组态分配。当数据不足时，利用核性质系统学和（或）理论计算的期望值。意外的或不一致的实验结果也被注意到。在使用加权平均程序的情况下，结果的指定不确定度通常不低于程序中使用的数据点的最低不确定度。

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Nuclear Data Sheets for A=30 A=30 的核数据表

IF 2.8 1区物理与天体物理 Q2 PHYSICS, NUCLEAR

Nuclear Data Sheets

Pub Date : 2024-09-02 DOI: 10.1016/j.nds.2024.08.001

M. Shamsuzzoha Basunia, Anagha Chakraborty

Evaluated spectroscopic data and level schemes from radioactive decay and nuclear reaction studies are presented for ³⁰F, ³⁰Ne, ³⁰Na, ³⁰Mg, ³⁰Al, ³⁰Si, ³⁰P, ³⁰S, ³⁰Cl, and ³⁰Ar. The recommended values for the level energies and their percentage decay modes, level lifetimes, γ energies, γ branching ratios, transition probabilities, etc. are presented. Among these nuclides, ³⁰F is unobserved and most likely particle unbound. Additional experimental data are required for firm spin-parity assignments of the low-lying excited levels of ³⁰Ne. The most well studied nuclide is ³⁰Si followed by ³⁰P. The data for the most proton-rich nuclide ³⁰Ar are presented following the recent work of 2018Xu04 and 2015Mu13. This evaluation for A=30 supersedes the previous one, 2010Ba29.

介绍了 30F、30Ne、30Na、30Mg、30Al、30Si、30P、30S、30Cl 和 30Ar 的放射性衰变和核反应研究的光谱数据和水平方案。介绍了能级能量及其衰变模式百分比、能级寿命、γ 能量、γ 支化比、转变概率等的建议值。在这些核素中，30F 是未观测到的，最有可能是未结合的粒子。要确定 30Ne 的低洼激发水平的自旋比值，还需要更多的实验数据。研究最深入的核素是 30Si，其次是 30P。最富含质子的核素 30Ar 的数据是根据 2018Xu04 和 2015Mu13 的最新研究成果提出的。这次对 A=30 的评估取代了之前的 2010Ba29。

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Nuclear Data Sheets Symbols and Abbreviations 核数据表符号和缩略语

IF 2.8 1区物理与天体物理 Q2 PHYSICS, NUCLEAR

Nuclear Data Sheets

Pub Date : 2024-09-02 DOI: 10.1016/S0090-3752(24)00058-9

引用次数: 0

Nuclear Structure and Decay Data for A=230 A=230 的核结构和衰变数据

IF 2.8 1区物理与天体物理 Q2 PHYSICS, NUCLEAR

Nuclear Data Sheets

Pub Date : 2024-09-02 DOI: 10.1016/j.nds.2024.08.002

C. Morse

The experimental reaction and decay studies producing nuclei in the A=230 mass chain have been reviewed. Data on elements from radon (Z=86) to americium (Z=95) are included, and level and decay schemes are presented for these nuclides. This work supersedes the previous evaluation for this mass chain (2012Br12).

对产生 A=230 质量链中原子核的实验反应和衰变研究进行了回顾。其中包括从氡（Z=86）到镅（Z=95）等元素的数据，并介绍了这些核素的水平和衰变方案。这项工作取代了先前对这一质量链的评估（2012Br12）。

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