摘要
本文讨论了高激发核中的同位旋标量表面巨共振和偶极巨共振.利用能量权重求和规则的概念在一个简化的模型中计算了^(208)Pb的巨共振能量,而有限温度下的推广的Thomas-Fermi近似则被用于描写有限温度平衡态.结果表明,能量权重求和规则和巨共振能量对体系温度的依赖都很弱.这一微弱的温度依赖可以归因于由温度引起的剩余相互作用的减弱以及参与跃迁的组态数增加这两个效应之间的相互抵消.
The isoscalar giant surface resonance and giant dipole resonance in highly excited nuclei are discussed. Excitation energies of the giant modes in ^(208)Pb are calculated in a simplified model, using the concept of energy weighted sum rule (EWSR), and the extended Thomas-Fermi approximation at the finite temperature is employed to describe the finite temperature equilibrium state. It is shown that EWSR and the energy of the resonance depend only weakly on temperature in the system: This weak dependence is analysed.
出处
《高能物理与核物理》
CSCD
北大核心
1989年第1期56-61,共6页
High Energy Physics and Nuclear Physics
