摘要
基于联合实施微观相互作用玻色子模型的最大F旋方案(sdIBM-Fˉmax)与γ射线能量-自旋曲线(γ-ray energy overspin curves,E-GOS)方案,成功描述了182Os核yrast带相继的SU(3)—U(5)—SU(3)结构相变,由于缺少直观解释而显得抽象.本文借助微观sdIBM-ˉFmax的微观参数与Bohr哈密顿量的势能曲面方程之间存在的泛函关系,几何地给出了对这种相继相变途径的另外一种可能理解;并阐述了在完全变形核的高角动量态中,由于量子效应在高激发态与低激发态之间生成高简并的临界区,提供了γ振动能量会变得低于转动能量的一个可能途径,从而实现了SU(3)—U(5)的相变.
Nuclear structure phase transitions SU（3）--U（5）--SU（3） of the yrast-band structure in 182Os nucleus are successfully described, based on the association of microscopic interacting Boson model （IBM） with the y-ray energy on spin curves （E-GOS）. It is very abstract because of lack of concrete facts. A probable explanation of these one after the other phase transitions are geometrically given, with a functional relation of microscopic parameters in microscopic sdlBM-Fmax approach and potential energy surface in Bohr collective model. It is expounded that at high angular momentum, in a well-deformed nucleus, a probable way to the y-vibrational energy can become lower than the rotational energy bcause there are a number of degeneracy states formed by quantum effect between the highter and lower excition states so as to achieve SU（3）--U（5） structue phase transition.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2013年第13期180-185,共6页
Acta Physica Sinica
基金
贵州省科学技术基金(批准号:黔科合J字LKM[2011]22号)资助的课题~~
关键词
yrast带结构演化
势能曲面
相变临界区
182Os核
evolution of yrast-band structure, potential energy surface, critical region in phase transition, 182Os nucleus
