Systematics of reduced B(E3) transition probabilities for E3 transitions in even-A nuclei in 50 ≤ Z ≤ 92 region

IF 2.5 4区 物理与天体物理 Q2 PHYSICS, NUCLEAR
P.S. Rawat, S. Kumar
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引用次数: 0

Abstract

In the nuclear landscape, many isomeric states near the shell closure decay via enhanced electric octupole (E3) transitions. The enhancement in the transition strength is linked to the nuclear interactions between shell-model orbitals near the Fermi level that differ by Δj=Δl=3, involving high-j intruder orbitals. The present study investigates the systematics of reduced B(E3) transition probabilities in even-A nuclei with proton numbers Z=5092. Experimental data were taken from the ENSDF, NSR and XUNDL databases. For recently measured E3 transitions, updated half-lives and branching ratios were used to determine refined B(E3) values, calculated using the RULER code. The observed systematic trend across various closed shells indicates that the octupole correlations are strongly developed in the heavier mass region. The transition rates were further analysed according to the type of E3 transition and their underlying configurations. The results reveal a clear pattern: nuclei with configurations involving octupole-driving orbitals show significantly enhanced B(E3) values, whereas the spin-flip and single-particle E3 transitions exhibit much weaker strengths.
50≤Z≤92区偶a核E3跃迁的约化B(E3)跃迁概率系统
在核领域,许多靠近壳层闭合的同分异构体态通过增强的电八极子(E3)跃迁而衰变。跃迁强度的增强与费米能级附近的壳模型轨道之间的核相互作用有关,其差异为Δj=Δl=3,涉及高j侵入者轨道。本文研究了质子数为Z=50 ~ 92的偶a核中还原B(E3)跃迁概率的系统分布。实验数据来源于ENSDF、NSR和XUNDL数据库。对于最近测量的E3转换,使用更新的半衰期和分支比率来确定精确的B(E3)值,使用RULER代码计算。不同封闭壳层间的系统趋势表明,在质量较重的区域,八极子相关得到强烈发展。根据E3转换的类型及其基本结构进一步分析了转换速率。结果显示了一个清晰的模式:包含八极子驱动轨道的原子核的B(E3)值显著增强,而自旋翻转和单粒子E3跃迁的强度要弱得多。
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 Physics A
Nuclear Physics A 物理-物理:核物理
CiteScore
3.60
自引率
7.10%
发文量
113
审稿时长
61 days
期刊介绍: Nuclear Physics A focuses on the domain of nuclear and hadronic physics and includes the following subsections: Nuclear Structure and Dynamics; Intermediate and High Energy Heavy Ion Physics; Hadronic Physics; Electromagnetic and Weak Interactions; Nuclear Astrophysics. The emphasis is on original research papers. A number of carefully selected and reviewed conference proceedings are published as an integral part of the journal.
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