Abstract
High-spin states have been studied in Pr, populated through the Cd(Na,) reaction at 115 MeV, using the Gammasphere -ray spectrometer. The negative-parity yrast band has been significantly extended to spin 45 and excitation energy 21.5 MeV, showing evidence for several rotational alignments. The positive-parity yrast band of Ce, populated through the channel of this reaction, was also populated to spin 38 and excitation energy 18 MeV. Cranking calculations indicate that these nuclei are soft with respect to the triaxiality parameter and that several competing nuclear shapes occur at high spin.
- Received 15 June 2011
DOI:https://doi.org/10.1103/PhysRevC.84.047302
©2011 American Physical Society