2004•arXiv (Cornell University)Open access
Rotational damping for rapidly rotating nuclei
Lu Guo, Jie Meng, En-Guang Zhao, Fumihiko Sakata
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Abstract
The damping of collective rotational motion is investigated in rare-earth nucleus $^{168}$Yb by means of particles-rotor model. It is found that the onset energy of rotational damping is around 1.1 MeV above yrast line, and the number of levels which form rotational band structure is thus limited. The calculated number of rotational bands about 30 at a given angular momentum agrees well with experimental data. The onset of rotational damping takes place quite gradually as a function of excitation energy. It is shown that the pairing correlation between valence particles has a significant effect on the appearance of rotational damping.