摘要
The energy levels of the odd-odd nucleus ^(86)Nb at low spins are calculated by using quasi-particles plus a rotor model. The distribution of the nearest-neighbour spacing and the spectral rigidity are studied. We find that the chaotic degree of the energy spectra increases with the increasing spin and reaches a maximum at I = 10;then it decreases gradually for spins above I = 10. The recoil term in the model Haniltonian makes the energy spectra slightly regular. The Coriolis force, however, makes the spectra chaotic and plays a major role in the spectral statistics of the odd-odd nucleus ^(86)Nb.
作者
郑仁蓉
朱顺泉
程南璞
ZHENG Ren-Rong;ZHU Shun-Quan;CHENG Nan-Pu(Department of Physics,Shanghai Normal University,Shanghai 200234;Department of Physics:Southwest Normal University,Chongqing 400715)
基金
Supported by the National Natural Science Foundation of China under Grant No.19875040.