Nuclear collectivity in the even–even 
                
                  
                
                $$^{164{-}178}$$
                
                  
                    
                      
                      
                        164
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                        178
                      
                    
                  
                
              Yb along the yrast line

Li, Huifang; Wang, Hualei; Liu, Minliang

doi:10.1007/s41365-018-0536-4

Cited by 4 publications

(1 citation statement)

References 47 publications

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“…In a band diagram, the rotational behavior of each configuration as well as the corresponding relative energy among the configurations can be easily visualized. We take the well-deformed nucleus 164 Yb as an example, which has recently been studied extensively [49][50][51]. In the calculations the deformed single-particle basis is constructed with the quadrupole and hexadecapole deformation parameters ε 2 =0.242, ε 4 =0.013 taken from [52].…”

Section: Rotational Behavior Of Multi-quasiparticle Bandsmentioning

confidence: 99%

Projected shell model analysis of structural evolution and chaoticity in fast-rotating nuclei

Wang

Dong

Chen

et al. 2019

J. Phys. G: Nucl. Part. Phys.

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Rotationally-induced chaotic motion in fast-rotating nuclei is investigated using the projected shell model with an aggressively extended multi-quasiparticle configuration space. The two-body Hamiltonian in separable forms with quadrupole–quadrupole plus pairing forces is diagonalized in superimposed states with more than 2000 angular momentum projected configurations. By taking 164Yb as an example, it is shown that the experimental energies and moment of inertia (MoI) for the yrast band can be clearly described. The variations in MoI are explained in terms of band crossings among the 2-quasiparticle (qp), 4-qp, 6-qp, and 8-qp bands, corresponding to successive pair-breakings caused by rotation. Moreover, the chaotic motion in different spin and excitation regions is studied by quantitatively analyzing the branching number. It is found that the degree of chaoticity increases monotonically with spin and excitation energy. At the highest spins, bands built by different numbers of quasiparticles, with their own characteristic rotational behavior originally at low spins, tend to rotate uniformly with the same rotational frequency, indicating an emergent nuclear collectivity appearing from an extremely chaotic system. The important role played by nucleon pairing in increasing the chaoticity is emphasized.

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