Evidence for superdeformation in Dy-149,Dy-150: Onset of the collapse of the Z=66 deformed shell closure? art. no. 037303

Authors
Appelbe, DE Beausang, CW Barton, CJ Caprio, MA Casten, RF Cederkall, J Cooper, JR Krucken, R Novak, JR Zamfir, NV Wang, Z
Citation
De. Appelbe et al., Evidence for superdeformation in Dy-149,Dy-150: Onset of the collapse of the Z=66 deformed shell closure? art. no. 037303, PHYS REV C, 6103(3), 2000, pp. 7303
Citations number
18
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW C-NUCLEAR PHYSICS
ISSN journal
05562813 → ACNP
Volume
6103
Issue
3
Year of publication
2000
Database
ISI
SICI code
0556-2813(200003)6103:3<7303:EFSIDO>2.0.ZU;2-8
Abstract
An experiment has been performed to search for superdeformed (SD) states in Dy-149,Dy-150. While no evidence for discrete superdeformed states has bee n observed, a superdeformed ridge with a separation of Delta E-gamma=52 keV with a total intensity of 1.8+/-0.5% that of Dy-150 has been observed. An upper limit of 0.8% (0.9%), of the intensity of Dy-150 (Dy-149), is placed for observation of the most intense discrete line states. The relative weak ness 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 Dy -152.