A≈190质量区奇A核超形变带的系统研究(英文)  

Systematic Description of the Superdeformed Bands of the Odd-A Nuclei in the A ≈ 190 Mass Region

作　　者：汤杰[1] 刘玉鑫[1] 

机构地区：[1]北京大学物理系,北京100871

出　　处：《高能物理与核物理》2004年第10期1055-1064,共10页High Energy Physics and Nuclear Physics

基　　金：国家自然科学基金 (19875 0 0 1,10 0 75 0 0 2 ,10 13 5 0 3 0 ) ;国家重点基础研究发展规划项目 (G2 0 0 0 0 7740 0 );教育部高等学校骨干教师计划资助~~

摘　　要：利用包括多体相互作用和具有SO(5 ) (或SU(5 ) )对称性的对转动对称微扰的超对称模型方法 ,对A≈ 1 90质量区奇A核的超形变转动带进行系统的研究 ,无论是E2跃迁γ射线能谱 ,还是动力学转动惯量都得到与实验结果很好定量符合的结果 .这表明 ,超对称方法不仅可以很好地描述超形变带的整体性质 ,还可以很好地描述超形变带的ΔI =4分岔和全同带等奇异现象 .Within the supersymmetry scheme including many body interactions and a perturbation possessing the SO (5) (or SU (5))symmetry on the rotational symmetry, the superdeformed (SD) bands of the odd A nuclei in A ≈190 mass region are investigated systematically. Quantitatively good results of the γ ray energy spectra and the dynamical moments of inertia are obtained. It shows that the supersymmetry approach is powerful in describing not only the generic rotational property, but also the Δ I =4 bifurcation and the identical bands in SD states simultaneously.

关 键 词：超形变带 奇A核 超对称模型 E2跃迁 微扰 转动带 整体性质 SU 定量 实验结果 

分 类 号：O571[理学—粒子物理与原子核物理] O572[理学—物理]