High-K Rotational Structures in Light Praseodymium Nuclei
Abstract
Strongly-coupled bands at high excitation energy have been observed in the proton-rich ^128-131Pr nuclei. The high-spin states of ^128,129Pr were populated in the ^40Ca + ^92Mo reaction at a beam energy of 184 MeV, while the heavier ^130,131Pr nuclei were produced in the ^40Ca + ^94Mo reaction with a beam energy of 180 MeV. In both experiments, Gammasphere and the Microball were utilized for the detection of gamma rays and light charged particles, respectively. The bands have similar characterists (e.g. large B(M1)/B(E2) ratios and no signature splitting) to structures in nearby nuclei that are associated with oblate deformations [1]. An investigation of whether the new sequences in the Pr nuclei are oblate or prolate has been conducted. Tilted axis cranking calculations and an analysis of the rotational alignments aid in determining the nuclear shape and configurations of these bands. [1] D. B. Fossan et al., Nucl. Phys. A520, 241c (1990).
- Publication:
-
APS Division of Nuclear Physics Meeting Abstracts
- Pub Date:
- October 2000
- Bibcode:
- 2000APS..DNP.DG006H