转动谱的若干理论及其对超形变带的研究  

Nuclear Rotational Spectral Theories and Its Application to Superdeformed Bands

作　　者：郭建友[1] 陈永静[1] 徐辅新[1] 

机构地区：[1]安徽大学物理系,安徽合肥230039

出　　处：《原子核物理评论》2001年第2期85-90,共6页Nuclear Physics Review

基　　金：兰州重离子加速器国家实验室原子核理论中心基金资助;安徽省教委基金资助 ( 98JL0 14 )

摘　　要：简述了若干转动谱理论及其对超形变带的应用 ,并用 Bohr- Mottelson的 I(I+1 )展开公式分析了 A=1 90区超形变带的性质和指定了它们的能级自旋 ,用 Harris的ω2 展开公式 J(1) =2α+(4/3 )βω2 +(6 /5 )γω4分析了 A=1 5 0区 Tb和 Dy同位素 2 0条超形变带的性质 ,指定了它们的能级自旋 .对于首次发现的152 Dy(1 )超形变带 ,带首自旋指定为 2 6 h。The recent developments of rotational spectral theories and its application to superdeformed bands were briefly reviewed. The superdeformed bands in A ≈190 region were analyzed and the spins of energy level were determined by the least square fitting experimental transition energy with the formula of Bohr Mottelson’s I(I+1) expansions. The superdeformed bands in A ≈150 region were analyzed by using the kinematic moments of inertia formula J (1) =2α+(4/3)βω 2+(6/5)γω 4 in order to extract level spin. The results show that the calculated J (1) of 20 superdeformed bands in Tb and Dy isotopes are agreement excellently with that of extracted from expression 2(2I-1)/E γ (I) . In particular, the spin of the lowest level of the first discovered high spin SD band 152 Dy(1) predicted to be I 0 =26 is more proper.

关 键 词：转动谱理论 能谱拟合 自旋指定 原子核 超形变带 

分 类 号：O571.23[理学—粒子物理与原子核物理]