Evidence for superdeformation in 149,150Dy: Onset of the collapse of the Z=66 deformed shell closure?

D. E. Appelbe, C. W. Beausang, C. J. Barton, M. A. Caprio, R. F. Casten, J. Cederkäll, J. R. Cooper, R. Krücken, J. R. Novak, N. V. Zamfir, and Z. Wang
Phys. Rev. C 61, 037303 – Published 16 February 2000
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Abstract

An experiment has been performed to search for superdeformed (SD) states in 149,150Dy. While no evidence for discrete superdeformed states has been observed, a superdeformed ridge with a separation of ΔEγ=52 keV with a total intensity of 1.8±0.5% that of 150Dy has been observed. An upper limit of 0.8% (0.9%), of the intensity of 150Dy (149Dy), is placed for observation of the most intense discrete line states. The relative weakness in the SD population is suggested to be due to a rapid decrease in the depth of the superdeformed minimum, as one moves away from doubly magic 152Dy.

  • Received 4 October 1999

DOI:https://doi.org/10.1103/PhysRevC.61.037303

©2000 American Physical Society

Authors & Affiliations

D. E. Appelbe1, C. W. Beausang2, C. J. Barton2,3, M. A. Caprio2, R. F. Casten2, J. Cederkäll2, J. R. Cooper2, R. Krücken2, J. R. Novak2, N. V. Zamfir2,3,4, and Z. Wang2

  • 1Department of Physics and Astronomy, McMaster University, Hamilton, Ontario, Canada L8S 4M1
  • 2Wright Nuclear Structure Laboratory, Yale University, 273 Whitney Avenue, New Haven, Connecticut
  • 3Clark University, Worcester, Massachusetts 01610
  • 4National Institute for Physics and Nuclear Engineering, Bucharest, Romania

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Vol. 61, Iss. 3 — March 2000

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