Studies of positive-parity low-spin states in the A = 150 region

by Robert Arthur Bark (iThemba LABS, National Research Foundation (ZA))

Tuesday 17 Jun 2025, 16:00 → 17:00 Europe/Zurich

508/1-001 (CERN)

A systematic investigation of low-lying levels of nuclides in the mass 150 region has been undertaken at iThemba LABS. An extensive set of data on the low-lying, positive-parity bands in the nuclides between N = 88 and 92 and Sm to Yb has been obtained from gamma-gamma coincidence measurements following fusion-evaporation reactions, optimized for the population of low-spin states. The energies and electromagnetic properties of the so-called beta- and gamma-bands of nuclei in this region have been compared with the solutions of a five dimensional collective Hamiltonian for quadrupole vibrational and rotational degrees of freedom, with moments-of-inertia and mass parameters determined by constrained self-consistent relativistic mean-field calculations using the PC-F1 relativistic functional.  Some of the results of this comparison are presented here.