衰变半衰期和俘获截面

IF 2.7 3区 物理与天体物理 Q2 PHYSICS, ATOMIC, MOLECULAR & CHEMICAL Atomic Data and Nuclear Data Tables Pub Date : 2024-08-30 DOI:10.1016/j.adt.2024.101684
V.Yu. Denisov
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引用次数: 0

摘要

在α衰变和α捕获统一模型(UMADAC)中,相同的α -核相互作用描述了α衰变和α捕获反应。利用420个原子核的基态到基态α跃迁半衰期数据、74个偶偶核从基态到第一激发态α跃迁半衰期数据以及20个球形和变形原子核的α俘获截面数据来确定UMADAC的参数。利用所获得的参数,在UMADAC框架中很好地描述了点数据。质子Z和核子A在50≤Z≤126和97≤A≤340范围内的3802原子核的基态到基态α跃迁半衰期在UMADAC中计算,如表1所示。在UMADAC中考虑了子核的四极和六极变形。利用现有的基态自旋和原子核宇称值的实验和理论数据,找到了基态间α跃迁轨道动量的最小值。从母偶核基态到子核最低2+态的223个α跃迁的半衰期,质子Z和核子A在52≤Z≤102和108≤A≤254的范围内,在UMADAC中得到,并给出了表2。
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Alpha-decay half-lives and alpha-capture cross-sections
The same alpha-nucleus interaction describes the alpha-decay and alpha-capture reactions in the Unified Model for Alpha-Decay and Alpha-Capture (UMADAC). The data for the ground-state-to-ground-state alpha-transition half-lives in 420 nuclei, the half-lives for alpha-transition from the ground state to the first excited 2+ state in 74 even–even nuclei, and the alpha-capture cross sections of 20 spherical and deformed nuclei are used for defining the parameters of the UMADAC. The pointed data are well described in the framework of the UMADAC utilizing the obtained parameters. The ground-state-to-ground-state alpha-transition half-lives in 3802 nuclei with the proton Z and nucleon A numbers in the ranges 50 Z 126 and 97 A 340 are calculated in the UMADAC and presented in the Table 1. The quadrupole and hexadecapole deformations of the daughter nucleus are considered in the UMADAC. The minimal values of the orbital momenta of the alpha-transition between the ground states are found using available experimental and theoretical data for the ground state spin and parity values of nuclei. The half-lives for 223 alpha-transitions from the ground-state of the parent even–even nuclei to the lowest 2+ state of the daughter nuclei with the proton Z and nucleon A numbers in the ranges 52 Z 102 and 108 A 254 are obtained in the UMADAC and given in the Table 2.
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来源期刊
Atomic Data and Nuclear Data Tables
Atomic Data and Nuclear Data Tables 物理-物理:核物理
CiteScore
4.50
自引率
11.10%
发文量
27
审稿时长
47 days
期刊介绍: Atomic Data and Nuclear Data Tables presents compilations of experimental and theoretical information in atomic physics, nuclear physics, and closely related fields. The journal is devoted to the publication of tables and graphs of general usefulness to researchers in both basic and applied areas. Extensive ... click here for full Aims & Scope Atomic Data and Nuclear Data Tables presents compilations of experimental and theoretical information in atomic physics, nuclear physics, and closely related fields. The journal is devoted to the publication of tables and graphs of general usefulness to researchers in both basic and applied areas. Extensive and comprehensive compilations of experimental and theoretical results are featured.
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