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arXiv 2402.06403nucl-th
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Mo和Ru同位素中形状共存与稳定性的相关性

Correlation between the Shape Coexistence and Stability in Mo and Ru isotopes

Mamta Aggarwal, G. Saxena, Pranali Parab

AI总结:

本研究采用Nilsson Strutinsky方法与相对论平均场模型,探究天体物理相关Mo、Ru同位素中形状共存对衰变模式、半衰期及核稳定性的影响,结果与实验数据吻合良好。

摘要:

在形状相变迅速的区域,本研究在采用Nilsson Strutinsky方法(尼尔森-斯特鲁廷斯基方法)与Relativistic Mean Field Model(相对论平均场模型)的微观理论框架内开展了广泛研究,探究了天体物理研究中受关注的Mo和Ru同位素中形状共存的存在情况及其对衰变模式和半衰期的可能影响。Mo和Ru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,以及大量主要为扁椭形和三轴形的共存态。研究计算了质子和中子分离能,并与现有数据进行了比较。两种理论方法得到的结果彼此吻合,且与现有实验数据一致性良好。我们对表现出形状共存的原子核的计算所得β衰变半衰期和分离能进行了检验,考察了从母核的第二极小态到子核基态或激发态的衰变模式。研究发现,Mo和Ru同位素中共存形状的第二极小态会影响原子核的结构性质、β衰变半衰期、分离能,进而影响原子核的稳定性。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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