Deformation and shape changes in 167W
Abstract
Lifetime measurements of yrast levels in 167W 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 167W were populated by the reaction 142Nd (28Si, 3 n ) at a beam energy of 144 MeV. The energy spectra and measured transition quadrupole moments inferred from the lifetimes of 167W are compared with the predictions of the cranked Nilsson-Strutinsky-Bogoliubov calculations. The changes of deformations and shapes with increasing spin due to the γ -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.
- Publication:
-
Physical Review C
- Pub Date:
- October 2016
- DOI:
- 10.1103/PhysRevC.94.044307
- Bibcode:
- 2016PhRvC..94d4307L