DOI
10.1103/PhysRevC.71.024309
Abstract
Excited states in 166Hf were populated in the β+/∈ decay of 166Ta and studied through off-beam γ –ray spectroscopy at the Yale moving tape collector. New coincidence data found no support for two previously reported excited 0+ states and led to a substantially revised level scheme. Similarities between the revised level scheme of 166Hf and the X(5) critical point symmetry are discussed, and the extent of X(5) behavior in this mass region is explored through the W and Os isotopes. Among X(5) candidates with N > 90, good agreement is observed for most energies and interband B(E2) strengths, while all exhibit similar disagreements with other key observables, in particular, yrast B(E2) values and spacing in the excited K = 0+ sequence.
Document Type
Article
Publication Date
2-22-2005
Publisher Statement
Copyright © 2005 The American Physical Society. This article first appeared in Physical Review C 71, no. 2 (February 22, 2005): 024309-1-24309-9. doi:10.1103/PhysRevC.71.024309.
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Recommended Citation
McCutchan, E., N. Zamfir, R. Casten, M. Caprio, H. Ai, H. Amro, C. Beausang, A. Hecht, D. Meyer, and J. Ressler. "γ-ray Spectroscopy of Hf166:X(5) in N90?" Physical Review C 71, no. 2 (February 22, 2005): 024309-1-24309-9. doi:10.1103/PhysRevC.71.024309.