The fusion and subsequent decay analysis of Z=116 superheavy nucleus formed via ⁴⁸Ca+²⁴⁸Cm→²⁹⁶Lv^*, ⁵⁰Ti+²⁴⁴Pu→²⁹⁴Lv^*,and ⁵⁸Fe+²³²Th→²⁹⁰Lv^* reactions is carried out using extended ℓ-summed Wong model and dynamical cluster decay model (DCM), respectively. First of all, the experimentally available fusion-fission (A/2±20) data is adequately addressed for ²⁹⁶Lv^* and ²⁹⁴Lv^* superheavy nuclei using extended ℓ-summed Wong model and the predictions are made for fusion-fission excitation function of ²⁹⁰Lv^* nucleus. It is observed that with decrease in mass-asymmetry (η), the contribution of fusion-fission component decreases. This drop is steeper for ⁵⁰Ti to ⁵⁸Fe as compared to that for ⁴⁸Ca to ⁵⁰Ti. The calculated values of compound nucleus formation probability (P_CN) are highest for ⁴⁸Ca followed by ⁵⁰Ti and ⁵⁸Fe. Finally, the mass distribution of decay fragments is studied for ²⁹⁶Lv^*, ²⁹⁴Lv^*, and ²⁹⁰Lv^* nuclei using DCM at near barrier energies. A valley in A_CN/2 region results in asymmetric mass distribution for ²⁹⁶Lv^* which becomes relatively symmetric for the lighter isotope ²⁹⁰Lv^*.

中文翻译：

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Z = 116超重核中裂变和准裂变的相对出现

使用扩展的sum-sum方法对通过⁴⁸ Ca + ²⁴⁸ Cm→ ²⁹⁶ Lv ^*，⁵⁰ Ti + ²⁴⁴ Pu→ ²⁹⁴ Lv ^*和⁵⁸ Fe + ²³² Th→ ²⁹⁰ Lv ^*反应形成的Z = 116超重核进行融合和随后的衰变分析Wong模型和动态簇衰减模型（DCM）。首先，对²⁹⁶ Lv ^*和²⁹⁴ Lv ^*的实验可用聚变裂变（A / 2±20）数据进行了适当处理。利用扩展的ℓ-加和Wong模型建立超重核，并对²⁹⁰ Lv ^*核的聚变裂变激发函数进行了预测。观察到，随着质量不对称性（η）的减小，聚变裂变成分的贡献减小。与⁴⁸ Ca到⁵⁰ Ti相比，⁵⁰ Ti到⁵⁸ Fe的下降更陡。对于⁴⁸ Ca，其次是⁵⁰ Ti和⁵⁸ Fe ，计算得到的复合核形成概率（P _CN）最高。最后，研究了²⁹⁶ Lv ^*的衰变碎片的质量分布，使用DCM在接近势垒能的情况下产生²⁹⁴ Lv ^*和²⁹⁰ Lv ^*核。在A _CN / 2区域中的谷导致²⁹⁶ Lv ^*的不对称质量分布，而对于较轻的同位素²⁹⁰ Lv ^*则变得相对对称。