164Lu的三轴超形变核态的研究

利用TRS方法对双奇核¹⁶⁴Lu的位能面进行了计算,确认了¹⁶⁴Lu核的一条三轴超形变带,结果与实验较好地符合,同时指出了三轴超形变带的一个具体的组态     

154Er核三轴超形变核态存在的微观机制

利用TRS方法计算了154Er核的总位能面,讨论了其存在三轴超形变核态的微观机制. Based on TRS theory the total routhian surface for~(154)Er nuclei is calculated, the result indicates it exists TSD state.     

奇奇核168Lu高自旋态及三轴超形变带的研究

采用TRS方法对¹⁶⁸Lu新发现的4条转动带进行了理论计算,证实了在实验上观测到的一条三轴超形变带,并得到其形变参数值.本工作还对准粒子能量随角频率的变化进行了研究,对实验结果给出了合理解释,说明了为什么实验上很难找到第四条转动带的旋称伙伴带     

168Hf三轴超形变核态的研究

采用TRS方法研究了¹⁶⁸Hf核的三轴超形变核态. 通过位能面计算给出了平衡形变参数, 证实了高自旋态下该核存在三轴不对称性. 通过分析各部分修正能量, 研究了其三轴超形变形成的机制: 主要原因是中子壳修正, 同时高j闯入轨道πi_13/2的形变驱动效应和转动能也起到重要作用.     

175Hf原子核的三轴超形变的探寻

通过采用TRS方法对实验上新发现的¹⁷⁵Hf原子核的两条高自旋转动带进行了研究, 以证明是否具有三轴超形变, 并且为了使结果能够更准确可靠, 选取了最靠近费米面的5个准粒子的组态进行了计算, 但是在这个组态上最后得出的总位能面上并没有发现能表明三轴超形变的明显的第二极小点的存在.     

转动频率对175Hf核的三轴超形变的影响

采用TRS方法对曾经在低转动频率下计算过的¹⁷⁵Hf进行较高转动频率的计算, 结果 在原来没有第二极小值的总位能面中出现了极小值, 进而分析它的产生机制, 并对两个 频率下的各部分能量进行了比较.     

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.     

轴对称超形变和三轴超形变核态性质的研究

利用轴对称超形变和三轴超形变模型研究了¹⁶⁵Lu π[660 1/2]带.两种模型计算的γ跃迁能量都和实验值较好地符合.然而,能量的signature颤动指数,三轴因子,两类动力学电四极矩之比存在明显的差别,这些差别可以用来识别三轴超形变核态.     

原子核的三轴超形变

利用粒子 -转子模型研究三轴超形变核态,讨论了区别轴对称超形变和三轴超形变可能的实验信息.为了直接从实验上识别三轴超形变带,必须同时测量能谱和电磁跃迁几率. Current developments in triaxial superdeformed states in nuclei are discussed from a theoretical perspective. A detailed analysis of superdeformed triaxial bands is made with particle-rotor model. Experimental information which may differentiate triaxial superdeformation from axially-symmetric superdeformation is disussed. In order to identify the superdeformed triaxial bands both the energy spectra and electromagnetic transition.     

组态混合对三轴超形变带的影响

考虑了不同j壳之间的组态混合,用粒子–转子模型研究了三轴超形变带.为了确认三轴超形变,应同时拟合能谱和跃迁几率的实验数据.     

Formation Mechanism of Triaxial Superdeformed Nucleus ^160Yb

By using Total Routhian Surface （TRS） method the deformation of the nucleus ^160Yb
is studied. The result shows that the triaxial superdeformed state exists with deformation parameters ε2 = 0.38 and γ = 21°, where proton shell correction energy plays a key role, and the sum of two quasi-proton particle energies gives an additional driving effect. The rotational energy also has an additional role in the formation of triaxial superdeformed.     

Study of Triaxial Superdeformation in 162Lu

The triaxially superdeformed states in 162Lu are investigated using the three-dimensional total routhian surface calculation, and the deformation parameters and the likely configuration are given. The shell and pairing correction energies are considered respectively, and the formation mechanism of triaxial superdeformation is investigated.     

Study of Triaxial Superdeformation in ^162Lu

The triaxially superdeformed states in ^162Lu are investigated using the three-dimensional total routhian surface calculation, and the deformation parameters and the likely configuration are given. The shell and pairing correction energies are considered respectively, and the formation mechanism of triaxial superdeformation is investigated.     

Possible existence of triaxial superdeformation in 172,174,176W

Two-dimensional total routhian surface (TRS) calculations are carried out to determine the triaxial superdeformation (TSD) of the even-even nucleus 174W, and the result indicates that TSD state exists with deformation parameters ε2=0.42 and γ=34.7°. In the same way, the total routhian surfaces for the nuclei 172,176W are also calculated. It shows that the neutron shell correction energy plays a key role in the formation of TSD nuclei 172,174,176W, while the high j intruder orbitals and rotational energy are also crucial in the formation mechanism.     

Possible existence of triaxial superdeformation in ^172,174,176W

Two-dimensional total routhian surface （TRS） calculations are carried out to determine the triaxial superdeformation （TSD） of the even-even nucleus 174W, and the result indicates that TSD state exists with deformation parameters ε2=0.42 andγ=34.7°. In the same way, the total routhian surfaces for the nuclei ^172,176W are also calculated. It shows that the neutron shell correction energy plays a key role in the formation of TSD nuclei ^172,174,176W, while the high j intruder orbitals and rotational energy are also crucial in the formation mechanism.