Mo 和 Ru 同位素形状共存与稳定性之间的相关性

IF 1.7 4区 物理与天体物理 Q2 PHYSICS, NUCLEAR Nuclear Physics A Pub Date : 2024-02-21 DOI:10.1016/j.nuclphysa.2024.122843
Mamta Aggarwal , G. Saxena , Pranali Parab
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引用次数: 0

摘要

利用尼尔森-斯特鲁廷斯基方法(Nilsson Strutinsky Method)和相对论平均场模型(Relativistic Mean Field Model),在微观理论框架内对具有天体物理学意义的钼和钌同位素进行了广泛研究,探索了快速变化的形状相区中形状共存的存在及其对衰变模式和半衰期的可能影响。钼和钌的同位素链表现出快速的形状相变、三轴γ软性、形状不稳定性以及多种共存态,其中大部分为扁球形和三轴形。我们计算了质子和中子的分离能,并与现有数据进行了比较。这两种形式的计算结果与现有的实验数据非常吻合。我们针对从母核的第二最小态到子核的基态或激发态的衰变模式,检验了我们计算的β-衰变半衰期和原子核形状共存的分离能。在 Mo 和 Ru 同位素中,共存形状的第二极小状态会影响核的结构特性、β-衰变半衰期、分离能,从而影响核的稳定性。
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Correlation between the shape coexistence and stability in Mo and Ru isotopes

In a rapidly changing shape phase region, the presence of shape coexistence and its possible impact on the decay modes and half-lives, has been explored in astrophysically interesting Mo and Ru isotopes, in an extensive study within the microscopic theoretical framework using Nilsson Strutinsky Method and Relativistic Mean Field Model. The isotopic chains of Mo and Ru exhibit rapid shape phase transitions, triaxial γ softness, shape instability along with many coexisting states mostly with oblate and triaxial shapes. Proton and neutron separation energies have been calculated and compared with the available data. Results obtained from both the formalisms are in good agreement with each other as well as the available experimental data. Our computed β-decay half-lives and separation energy for nuclei exhibiting shape coexistence were examined for the decay mode from second minima state of the parent nuclei to the ground or excited state of the daughter nuclei. The second minima state of the coexisting shapes in Mo and Ru isotopes, were seen to impact the structural properties, β-decay half-lives, separation energy and hence the stability of the nuclei.

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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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