By systematically analyzing the single particle level and the occupation probability near the Fermi surface of uranium isotopes and the particle number deviation within the relativistic mean-field model with BCS theory,we find that most of the uranium isotopes have more stable shell structure than ordinary elements,namely possess the shell effect characteristics similar to closed shell nucleus.
在考虑了BCS近似的相对论平均场模型的框架内,通过系统研究U同位素费米面附近的单粒子能级、单粒子能级占有概率和BCS近似下的粒子数偏差,首次发现U同位素中的大多数元素均有比一般元素更稳定的壳结构,即具有和闭壳核相似的壳效应特性。