关于A≈190超形变核态自旋指定的综合分析

Synthetical Analysis of the Spin Assignment for the Superdeformed Bands in A≈190 Region

不拘泥在I(I+ 1 )展开式中究竟取几项 (即采用三参数还是四参数 ) ,而是着重看其收敛过程 ,并在这一基础上用物理量拟合法和带首转动惯量系统学等方法对A≈ 1 90核区偶偶核的超形变转动带的自旋指定做了综合分析和讨论 ,给出了结果并与其他文献做了比较 .

The spin assignment for the superdeformed bands of even even nuclei in A≈ 190 region is given by means of using the method of synthetical analysis. In this work, the I(I +1) expression is used to fit the experimental data of the transition γ energies. In contrast to other procedure, 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 of fitting the physical quantity, by use of these series expansions the moment of inertia of band heads is also calculated and then the systematics is used for the spin assignments. In practice, when the experimental data is abundant the systematics of the moment of inertia of band heads is more efficient than the method of fitting the physical quantity in the spin assignment. As for a few bands which spin assignment is difficult, the deviation from the typical rotational bands must be considered, which may be judged easily from the second class of moment of inertia of the bands. Finally the results of the spin assignment and the comparison with other literature are presented. These results should be more reliable.