标题： 紧束缚和弱束缚体系散射中的核-核势 显示英文标题

标题： Nucleus-nucleus potentials in the scattering of tightly and weakly bound systems

摘要： \begin{description} \item [背景] 聚变反应在核合成和社会应用中起着重要作用。然而，它们的建模仍然具有挑战性。 \item [目的] 在这项工作中，我们研究描述融合截面的核-核势的特征，并与弹性散射和其他直接反应截面的现实计算所需的特征进行比较。 \item [方法] 我们进行耦合通道计算，以研究库仑屏障附近的弹性散射和融合反应，使用紧密结合的弹核（$^{16}$O+$^{144}$Sm）。 我们还进行连续离散耦合通道计算，以研究同一能量范围内的弱结合弹核的弹性散射 ($^{8}$B+$^{58}$Ni) 和融合 ($^{6}$Li+$^{198}$Pt)。 \item [结果] 我们将耦合通道的结果与在单通道解中得到的结果进行对比，不同的极化势假设以阐明两种不同反应通道所需的有关吸收项。 \item [结论] 我们的结果表明，对直接过程和融合反应的建模可能需要不同的近似方法。 \end{description} 显示英文摘要

摘要： \begin{description} \item[Background] Fusion reactions play an important role in nucleosynthesis and in applications to society. Yet they remain challenging to model. \item[Purpose] In this work, we investigate the features of the nucleus-nucleus potentials that describe fusion cross sections and compare with those needed for realistic calculations of elastic scattering and other direct-reaction cross sections. \item[Method] We perform coupled-channel calculations for studying elastic and fusion reactions around the Coulomb barrier with a tightly bound projectile ($^{16}$O+$^{144}$Sm). We also perform Continuum Discretized Coupled Channel calculations to study elastic ($^{8}$B+$^{58}$Ni) and fusion ($^{6}$Li+$^{198}$Pt) of loosely bound projectiles in the same energy regime. \item[Results] We contrast the coupled-channel results with those obtained in a single-channel solution with different assumptions for polarization potentials to shed light on the relevant absorption terms required for the two different reaction channels. \item[Conclusions] Our results suggest that different approximations may be required for modeling direct processes and for modeling fusion reactions. \end{description}