Abstract
Background: Nuclei in the mass region show gradual shape changes from prolate through nonaxial deformed shapes and ultimately towards spherical shapes as the Pb region is approached. Exploring how this shape evolution occurs will help us understand the evolution of collectivity in this region.
Purpose: The level scheme of the Au nucleus in region was studied in order to deduce its deformations.
Methods: High-spin states of Au have been populated in the W(B, 5) reaction at a beam energy of 68 MeV and their decay was studied using the YRAST Ball detector array at the Wright Nuclear Structure Laboratory (WNSL), Yale University.
Results: Based on double and triple -ray coincidence data the level scheme of Au has been extended up to at an excitation energy of 6 MeV.
Conclusion: The results are discussed in the framework of pairing and deformation self-consistent total Routhian surface (TRS) and cranked shell model (CSM) calculations. The comparison of the experimental observations with the calculations indicates that this nucleus takes a nonaxial shape similar to other Au nuclei in this region.
- Received 14 July 2012
DOI:https://doi.org/10.1103/PhysRevC.86.054305
©2012 American Physical Society