论文标题

簇发射的概率和运动学概率和运动学

Preformation Probability and Kinematics of Clusters Emission yielding Pb-daughters

论文作者

Majekodunmi, Joshua T., Bhuyan, M., Anwar, K., Abdullah, N., Kumar, Raj

论文摘要

在本研究中,首次应用了新建立的预制公式,以研究各种放射性核的簇发射的运动学,尤其是那些腐烂到双壳闭合$^{208} $ pb核的腐烂的核。最近提出的通用群集预制公式是基于强调质量和电荷不对称影响($η_a$和$η_z$)的概念,集群质量$ a_c $和Q-value的,铺平了量化的方式,以量化在预构件过程中量化能量贡献的方法。通过使用NL $ 3^*$和现象学M3Y NN的潜在,通过将相对论的平均场(RMF)密度折叠与最近开发的显微镜R3Y获得的相对论平均场(RMF)密度可获得群集笑的相互作用。渗透概率是根据WKB近似计算得出的。随着新的预性概率$ P_0 $的包含,R3Y和M3Y相互作用的预测半衰期与实验数据非常吻合。此外,仔细的检查反映了衰减半衰期的略有差异,这是由于它们各自的屏障特性引起的。 $ p_0 $用于具有双魔法外壳闭合的系统$^{208} $ pb女儿的$ \ pb女儿的订单相对较高,$ \ \ \ \ \ \ \ \ \ \ \ \ \ \ $ \ \ \ \ 10^2 $大约比附近的PB-Dapting Nuclei。通过探索衰减能量的贡献,与其他几种猜想不同,对子核的后坐力效应进行了评估。因此,在预先形成的群集模型中证明并重新定义了Q值在衰减过程中的中心性。此外,我们引入了一组简单而直观的标准,该标准控制着集群放射性中的后坐力的估计。

In the present study, the newly established preformation formula is applied for the first time to study the kinematics of the cluster emission from various radioactive nuclei, especially those decaying to the double-shell closure $^{208}$Pb nucleus and its neighbours as daughters. The recently proposed universal cluster preformation formula has been established based on the concepts that underscore the influence of the mass and charge asymmetry ($η_A$ and $η_Z$), cluster mass $A_c$ and the Q-value, paving the way to quantify the energy contribution during the preformation as well as the tunnelling process separately. The cluster-daughter interaction potential is obtained by folding the relativistic mean-field (RMF) densities with the recently developed microscopic R3Y using the NL$3^*$ and the phenomenological M3Y NN potentials to compare their adaptability. The penetration probabilities are calculated from the WKB approximation. With the inclusion of the new preformation probability $P_0$, the predicted half-lives from the R3Y and M3Y interactions are in good agreement with the experimental data. Furthermore, a careful inspection reflects slight differences in the decay half-lives, which arise from their respective barrier properties. The $P_0$ for the systems with the double magic shell closure $^{208}$Pb daughter are found to be relatively higher with an order of $\approx 10^2$ than those with neighbouring Pb-daughter nuclei. By exploring the contributions of the decay energy, the recoil effect of the daughter nucleus is appraised, unlike several other conjectures. Thus, the centrality of the Q-value in the decay process is demonstrated and re-defined within the preformed cluster-decay model. Besides, we have introduced a simple and intuitive set of criteria that governs the estimation of recoil energy in the cluster radioactivity.

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