关于A≈190奇质量核超形变signature伙伴带自旋指定的讨论  

Discussion of Spin Assignment of the Signature Partner Bands in Odd-A Superdeformed Nuclei in A≈190 Region

作　　者：狄尧民[1] 

机构地区：[1]徐州师范大学物理系,徐州221009

出　　处：《高能物理与核物理》2003年第3期227-232,共6页High Energy Physics and Nuclear Physics

基　　金：江苏省教育厅自然科学基金资助~~

摘　　要：既考虑到脱耦合效应而进行双带分析 ,又进行通常的单带分析 ,对A≈ 190核区奇质量核的signature伙伴带的自旋指定做了讨论并给出了明确结果 .在具体的计算中 ,不拘泥在I(I +1)展开式中究竟取几项 ,而是着重看其收敛过程 。s The spin assignments of the signature partner bands in odd A superdeformed nuclei in A ≈190 region are discussed and the results are gived. To consider the decoupling effect in strong coupling limit of the particle rotator model, in addition to using the ordinary I(I +1)expression to fit the experimental data of the energies of γ transition in a single band, the double bands method of analysis is used to fit the data in signature partner bands simultaneously. In the work, the convergence process of the series expansions is put stress upon, whereas taking how many terms exactly in the expression does not emphasized. Moreover, as well as the method fitting the physical quantity, by use of these series expansions the moments of inertia of the band heads are also calculated and the systematics is used for the spin assignments. In spite of the double bands fitting method is more reasonable in physics, the practical calculation manifests that the single fitting method is equally effective and even more effective than the double bands fitting method. It shows that the decoupling effect is small and the strong coupling limit is a good approximation in the A ≈190 odd A nuclei region.

关 键 词：超形变带 奇质量核 signature伙伴带 自旋指定 带首转动惯量系统学 A≈190核区 转动带 原子核物理 

分 类 号：O571.2[理学—粒子物理与原子核物理]