Impact of nuclear rotation corrections on alpha decay half-lives of superheavy nuclei within 98 ≤ Z ≤ 120

IF 1.7 4区 物理与天体物理 Q2 PHYSICS, NUCLEAR
Theeb Y.T. Alsultan , Joshua T. Majekodunmi , Raj Kumar , Boon Tong Goh , M. Bhuyan
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引用次数: 0

Abstract

The influence of nuclear rotation on the decay half-lives of superheavy nuclei within the range 98Z120 is investigated using the axially deformed relativistic Hartree-Bogoliubov theory in the continuum (DRHBc) with the PC-PK1 parameter set. The deduced DRHBc decay energies (with and without the rotation effect) are compared with those calculated from the macroscopic-microscopic WS4 and the available experimental binding energies. Six semi-empirical formulae, such as the Viola-Seaborg formula (VSS), the modified Brown formula (mB1), the semi-empirical relationship based on fission theory (SemFIS2), the Royer formula (R), the Wang formula (Wang) and the modified YQZR formula (MYQZR) are employed to estimate the half-lives of α decay. Among these formulae, the half-live predictions of SemFIS2 are found to gradually deviate from the systematic trend beyond Nd=184, showing that the probability of undergoing spontaneous fission is less feasible beyond this point. A minimum is observed at Nd=184, reflecting its neutron shell closure for the mass region considered on the nuclear chart. The results further indicate that, for 98Z104, the predictions of all semi-empirical formulae are more closely matched to the available experimental data when the rotation effect is taken into account. However, we have demonstrated that the effect of nuclear rotation gradually reduces as the atomic nucleus becomes heavier.

98内核旋转修正对超重核α衰变半衰期的影响 ≤ Z ≤ 120
采用轴向变形相对论harree - bogoliubov理论,在PC-PK1参数集下,研究了核旋转对98≤Z≤120范围内超重核衰变半衰期的影响。将推导出的DRHBc衰变能(有旋转效应和没有旋转效应)与从宏观-微观WS4计算得到的能量和可用的实验结合能进行了比较。采用Viola-Seaborg公式(VSS)、修正的Brown公式(mB1)、基于裂变理论的半经验关系式(SemFIS2)、Royer公式(R)、Wang公式(Wang)和修正的YQZR公式(MYQZR) 6个半经验公式来估计α衰变的半衰期。在这些公式中,发现在Nd=184之后,SemFIS2的半衰期预测逐渐偏离系统趋势,表明在此之后发生自发裂变的可能性较小。在Nd=184处观察到最小值,反映了核图上所考虑的质量区域的中子壳层闭合。结果进一步表明,当98≤Z≤104时,考虑旋转效应时,所有半经验公式的预测结果与现有实验数据更接近。然而,我们已经证明,随着原子核变重,核旋转的影响逐渐减弱。
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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