Nuclear Techniques ›› 2014, Vol. 37 ›› Issue (10): 100506-100506.doi: 10.11889/j.0253-3219.2014.hjs.37.100506


g-factor measurement of positive parity yrast band of 108Cd

FAN Ping1 YUAN Daqing1 ZHENG Yongnan1 ZUO Yi1 ZHANG Qiaoli1 WU Xiaoguang1 LI Guangsheng1 ZHU Lihua2 XU Guoji1 FAN Qiwen1 LIANG Juncheng1 ZHANG Xizhen1 ZHU Shengyun1   

  1. 1(Chinese Institution of Atomic Energy, Beijing 102413, China) 2(Beihang University, Beijing 100191, China)
  • Received:2014-05-04 Revised:2014-08-06 Online:2014-10-10 Published:2014-10-16

Abstract: Background: The interplay between the collective rotation and the quasi-particle alignment is a significant feature of nuclear structure at high spins. The g-factors of intra-band high spin states of the ground rotational band can provide direct and unique information on quasi-particle alignment since the g-factors of the high-j proton and the high-j neutron are positively large and negatively small, respectively. Purpose: The present work was motivated to measure g-factors of the rotational states of the positive parity yrast band in 108Cd and to study the quasi-particle alignment. Methods: High spin states of 108Cd were populated by the fusion-evaporation reaction 76Ge(37Cl,1p4n)108Cd at beam energy of 135 MeV from the HI-13 tandem accelerator at China Institute of Atomic Energy, and the g-factors were determined by the transient-magnetic filed-ion implantation perturbed angular distribution (TMF-IMPAD) method. Results: The measured g-factors of 2+, 4+ state are 0.33(11), 0.18(6), respectively. The h11/2 neutrons align at the 10+ state, which leads to the decrement of the g-factors. And the g7/2 neutrons align gradually from 10+ to 16+, which makes the g-factors increase. Conclusion: The g-factor of the bend head of the anti-magnetic rotation band, 16+ state, was measured and the value is ?0.09(3).

Key words: g-factor, Transient-magnetic filed-ion implantation perturbed angular distribution (TMF-IMPAD) method, 108Cd