190区超形变核中转动带的组态结构  

Configuration Structure of Superdeformed Bands in A-190 Mass Region

作　　者：刘树新[1] 

机构地区：[1]北京大学物理学院

出　　处：《高能物理与核物理》2005年第9期871-874,共4页High Energy Physics and Nuclear Physics

基　　金：国家自然科学基金(10375001)资助~~

摘　　要：通过系统研究A-190区超形变核中转动带的转动惯量、角动量顺排、旋称分裂随转动频率的变化规律,结合我们用处理对力的粒子数守恒方法的计算结果,对A-190区所有转动带的组态结构给出了一个整体的描述.绝大多数超形变带都建立在强耦合轨道上,例如中子[512]5/2,[624]9/2.少数超形变带则建立在高j闯入轨道上,即中子[761]3/2,[752]5/2.根据我们提出的组态结构所进行的理论计算结果表明,A-190区所有转动带的一般行为、反常变化和带交叉都得到了满意的解释.Using the particle-number conservation method for treating the cranked shell model with pairing interaction, we systematically investigate the variations of the moments of inertia, the angular moment alignment and the signature splitting with rotational frequencies for superdeformed bands in the A-190 mass region. According to our calculated results, we provide a global description of the configuration structure of superdeformed bands in the A-190 mass region. Most superdeformed bands are located at the strong-coupling orbits, such as neutron [512]5/2, [624]9/2. A few superdeformed bands lie on high j orbits, i.e., neutron [761]3/2, [752]5/2. Our calculated configuration assignments give a satisfactorily explanation to the general behavior, the anomalous change and the band crossing of superdeformed bands in the A-190 mass region.

关 键 词：超形变转动带 粒子数守恒方法 动力学和运动学转动惯量 高j闯入轨道 超形变核 转动带 结构 组态 计算结果 超形变带 

分 类 号：O571.2[理学—粒子物理与原子核物理]