1. Deformation and shape changes inW167
- Author
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X. G. Wu (吴晓光), C. Y. He (贺创业), B. J. Zhu (朱保吉), J. Zhong (钟健), L. P. Luo (罗朋威), H. L. Ma (马海亮), Q. M. Chen (陈启明), Y. Zheng (郑云), G. S. Li (李广生), S. P. Hu (胡世鹏), Y. H. Wu (吴义恒), H. W. Li (李红伟), and C. B. Li (李聪博)
- Subjects
Physics ,010308 nuclear & particles physics ,Yrast ,Nuclear Theory ,Parity (physics) ,01 natural sciences ,Spectral line ,Excited state ,0103 physical sciences ,Quadrupole ,Deformation (engineering) ,Atomic physics ,Nuclear Experiment ,010306 general physics ,Spin (physics) ,Energy (signal processing) - Abstract
Lifetime measurements of yrast levels in $^{167}\mathrm{W}$ were measured using the recoil-distance Doppler-shift method. The differential decay-curve method was applied for a lifetime determination. Excited states of the nucleus $^{167}\mathrm{W}$ were populated by the reaction $^{142}\mathrm{Nd}$ ($^{28}\mathrm{Si}, 3n$) at a beam energy of 144 MeV. The energy spectra and measured transition quadrupole moments inferred from the lifetimes of $^{167}\mathrm{W}$ are compared with the predictions of the cranked Nilsson-Strutinsky-Bogoliubov calculations. The changes of deformations and shapes with increasing spin due to the $\ensuremath{\gamma}$-polarization effect of aligned particles are discussed. The signature inversion visible in the negative parity yrast band is explained to be related to the triaxial shapes.
- Published
- 2016
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