Fusion reactions ⁴⁰Ar + ¹¹⁶Sn, ⁴⁰Ar + ¹²²Sn and ⁴⁰Ca + ¹²⁴Sn have been examined by employing coupled channel (CC) approach using code-CCFULL. Here we aim to investigate the influence of multi-neutron transfer channels in addition to coupling of collective excitations on sub-barrier fusion enhancement. Incorporation of inelastic excitations alone reproduced the experimental results for ⁴⁰Ar + ¹¹⁶Sn system while for ⁴⁰Ar + ¹²²Sn contribution of 2n transfer channel is required to explain the experimental data. However, CC calculations with 2n transfer could not explain the enhancement at sub-barrier energies for ⁴⁰Ca + ¹²⁴Sn system. Therefore, the empirical coupled channel (ECC) calculations have been carried out to include the effect of multi-neutron transfer channels and it is found that the incorporation of sequential 4n transfer channel reproduced the experimental results in entire energy region. Nevertheless, it is observed that multi-neutron transfer coupling significantly contributed in raising the sub-barrier fusion cross sections particularly for the reactions where colliding partners are spherical. Importantly, it is also found that transfer of even number of neutrons play dominating role in sub-barrier fusion enhancement.

聚变反应⁴⁰ Ar +  ¹¹⁶ Sn、⁴⁰ Ar +  ¹²² Sn 和⁴⁰ Ca +  ¹²⁴ Sn 已通过使用代码 CCFULL 的耦合通道 (CC) 方法进行了检查。在这里，我们的目的是研究除了集体激发耦合之外的多中子传输通道对亚势垒聚变增强的影响。单独结合非弹性激励再现了⁴⁰ Ar +  ¹¹⁶ Sn 系统的实验结果，而对于⁴⁰ Ar +  ¹²² Sn 系统，需要 2n 传输通道的贡献来解释实验数据。然而，2n 转移的 CC 计算无法解释⁴⁰ Ca +  ¹²⁴ Sn 系统亚势垒能量的增强。因此，进行了经验耦合通道（ECC）计算，以包括多中子传输通道的影响，并发现顺序4n传输通道的结合再现了整个能量区域的实验结果。然而，据观察，多中子转移耦合对提高亚势垒聚变截面有显着贡献，特别是对于碰撞伙伴为球形的反应。重要的是，还发现偶数中子的转移在亚势垒聚变增强中起主导作用。