三轴超形变核态的研究

首次利用粒子-转子模型描述了¹⁶³Lu、¹⁶⁵Lu和¹⁶⁷Lu三轴超形变带.γ跃迁能量、运动学和动力学转动惯量以及¹⁶³Lu的跃迁四极矩理论值和实验值较好地符合.     

Systematic Study on Triaxial Superdeformed Bands of Hf Isotopes

Properties of the triaxiai superdeformed （TSD） bands of Hf isotopes are investigated systematicaily within the supersymmetry scheme including many-body interactions and a perturbation possessing the SO（5） （or SU（5）） symmetry on the rotational symmetry. Quantitatively good results of the γ-ray energies, the dynamical moments of inertia, and the spin of the TSD bands in Hf isotopes are obtained. It shows that this approach is quite powerful in describing the properties of the triaxial superdeformation in Hf isotopes.     

超形变核149Tb中的旋称伙伴带

系统分析了149Tb中的5条超形变带,在对跃迁能量进行光滑化处理后,采用ab拟合或改进的ab拟合,确切地指定了它们的自旋值,其,24和3,5两带都分别构成旋称伙伴带,根据它们的脱耦合常数值,指认了149Tb费米面附近相应的Ω＝1／2单粒子态。     

Description of the Superdeformed Bands of Double Odd Nuclei in A ～ 190 Region

With the supersymmetry scheme including many-body interactions and aperturbation possessing the SO(5)(or SU(5)) symmetry on the rotational symmetry, the superdeformed bands and △I＝4 bifurcation of odd-odd nuclei in A ～ 190 mass region are investigated systematically. Good results for the γ-ray energies, the dynamical moments of inertia, and energy differences △Eγ - △Eref γ are obtained. It shows that this approach is quite powerful in describing odd-odd nuclei in the region.     

ΔI = 1 Staggering in Doubly Odd Superdeformed Nuclei

The ΔI = 1 staggering in doubly odd superdeformed nuclei is systematically investigated. Large-amplitude staggerings emerge in a series of the signature partners. The behavior is analyzed and parametrised in the conventional collective model. The spins of signature partner pairs are assigned in ab and modified ab expressions.     

带首转动惯量系统学与超变形转动带自旋的系统指定

用确定转动带自旋的3种方案,即最佳拟合法,图解法和带首转动惯量系统学,对A≈190区已测出的超变形带的自旋进行了系统的分析.绝大多数(约70条)超变形带的自旋已经可靠地指定.对于实验上已经测定自旋的超变形带,自旋指定与实验完全一致.详细地分析了这些超变形带的带首转动惯量系统学.     

粒子－转子模型分析超形变转动带

利用三轴粒子－转子模型计算了（１９３）Ｔｌ超形变带γ跃迁能量，运动学转动惯量Ｊ（１）和动力学转动惯量Ｊ（２），并与实验值进行比较得到了满意的结果；预言了Ｂ（Ｍ１）值以及动力学电四极矩Ｑ（１）和Ｑ（２）指出在超形变带的分析中粒子－转子模型是一种可以采用的方法．     

Band head spin assignment of superdeformed bands in Hg isotopes through power index formula

The power index formula has been used to obtain the band head spin(I_0) of all the superdeformed(SD) bands in Hg isotopes. A least squares fitting approach is used. The root mean square deviations between the determined and the observed transition energies are calculated by extracting the model parameters using the power index formula. Whenever definite spins are available, the determined and the observed transition energies are in accordance with each other. The computed values of dynamic moment of inertia J~((2)) obtained by using the power index formula and its deviation with the rotational frequency is also studied. Excellent agreement is shown between the calculated and the experimental results for J~((2)) versus the rotational frequency. Hence, the power index formula works very well for all the SD bands in Hg isotopes expect for ~(195)Hg(2, 3, 4).