Single-particle states in sup149Er and sup149Ho, and the effect of the Z=64 closure

K. S. Toth; Y. A. Ellis-Akovali; F. T. Avignone, III; R. S. Moore; D. M. Moltz; J. M. Nitschke; P. A. Wilmarth; P. K. Lemmertz; D. C. Sousa; A. L. Goodman

doi:10.1103/PhysRevC.32.342

Rapid Communication

Single-particle states in sup149Er and sup149Ho, and the effect of the Z=64 closure

K. S. Toth, Y. A. Ellis-Akovali, F. T. Avignone, III, R. S. Moore, D. M. Moltz, J. M. Nitschke, P. A. Wilmarth, P. K. Lemmertz, D. C. Sousa, and A. L. Goodman

Phys. Rev. C 32, 342(R) – Published 1 July 1985

Abstract

The decay of sup149Er was investigated by γ-ray spectroscopy. Based on these measurements the ssub1/2, dsub3/2, and hsub11/2 neutron states in sup149Er and the ssub1/2, dsub3/2, dsub5/2, and gsub7/2 proton states in sup149Ho were identified. A systematic examination of these proton states in N=82 isotones indicates a modest closure at Z=64, rather than a major one as suggested previously. Spherical Hartree-Fock-Bogolyubov calculations for even-Z N=81 and odd-Z N=82 nuclei are compared with experiment.