粒子-转子模型与奇奇核的能谱统计分析  

Quasiparticles Plus Rotor Model and the Analysisof Level Statistics of Odd-Odd Nucleus

作　　者：程南璞[1] 郑仁蓉[1] 朱顺泉[1] 

机构地区：[1]上海师范大学物理系

出　　处：《高能物理与核物理》2001年第8期736-742,共7页High Energy Physics and Nuclear Physics

基　　金：国家自然科学基金 ( 1 98750 4 0 )资助&&

摘　　要：用轴对称粒子 -转子理论模型计算奇奇核84Y低自旋下的能谱 ,研究了能谱的最近邻能级间距分布和能谱刚性度随自旋的变化规律 ,并对该模型中特定形式的质子 -中子相互作用和科氏力作用对能谱统计特征的影响作了分析 .The energy levels of odd-odd nucleus 84 Y at low spins were calculated by using the axially symmetric particles plus rotor model. In order to study the statistical properties of the energy levels, the two standard tests of Random-Matrix Theory such as the nearest-neighbor level spacings and the spectral rigidity were adopted. It is shown that the chaotic degree of the energy levels initially increases with increasing spin and reaches a maximum around I=10, and then decreases for spins above I≈10. On the other hand, the proton-neutron interaction makes the energy levels slightly regular/ordered. However, the Coriolis force which makes the energy levels chaotic plays a major role in the spectral structure of the odd-odd nucleus 84 Y.

关 键 词：粒子-转子模型 奇奇核 能谱统计 邻能级间距 能谱刚性率 

分 类 号：O571[理学—粒子物理与原子核物理]