深亚垒能聚变：再论势反转
Fusion at deep subbarrier energies: potential inversion revisited
摘要：
对于单个势垒，可以基于WKB近似来反转势垒穿透性以产生势垒厚度。我们将这种方法应用于能量远低于库仑势垒的重离子聚变反应，并直接确定碰撞核之间的核间势。为此，我们假设，在深亚势垒能量的融合截面的势垒分布中的最低势垒。$^{16}$ O + $^{144}$ Sm和$^{16}$ O + $^{208}$ Pb反应的反转核间势比唯象势厚得多。我们讨论了这样的厚势的一个后果，通过拟合的倒位与Bass函数。
英文摘要：
For a single potential barrier, the barrier penetrability can be inverted based on the WKB approximation to yield the barrier thickness. We apply this method to heavy-ion fusion reactions at energies well below the Coulomb barrier and directly determine the inter-nucleus potential between the colliding nuclei. To this end, we assume that fusion cross sections at deep subbarrier energies are governed by the lowest barrier in the barrier distribution. The inverted inter-nucleus potentials for the $^{16}$O +$^{144}$Sm and $^{16}$O +$^{208}$Pb reactions show that they are much thicker than phenomenological potentials. We discuss a consequence of such thick potential by fitting the inverted potentials with the Bass function.
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