On the coexistence of oblate and prolate deformed bands in83Zr View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

1989-12

AUTHORS

W. Fieber, K. Bharuth-Ram, J. Heese, F. Cristancho, C. J. Gross, K. P. Lieb, S. Skoda, J. Eberth

ABSTRACT

Deformation parameters of the positive parity yrast band and negative parity bands in83Zr are deduced from lifetimes andE2/M1 mixing ratios. Lifetimes of high spin states have been determined from recoil distance Doppler shift and Doppler shift attenuation measurements using the54Fe(32S,2pnγ)83Zr reaction. Ten lifetimes and five lifetimes limits were determined. The positive parity band, built on theg9/2K=5/2 orbital has an average deformation ¦β2¦=0.28(2), and shows a reduction ofE2 transition strengths in the observed backbend region at Iπ≈21/2+. In contrast, theE2 strengths in the negative parity states show a steady increase up to Iπ≈=15/2−. These states are more strongly deformed than the positive parity states (¦β2¦=0.33(3)). TheE2/M1 mixing ratios show that the negative parity band hasK=3/2 and is prolate, and favour oblate deformation for the positive parity yrast band. In theK=1/2− band theE2 strength of the 7/2−→3/2− transition yields a deformation ¦β2¦=0.26(5). The band structure is compared with calculations within the Hartree-Fock Bogoliubov cranking model. More... »

PAGES

363-370

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/bf01292420

DOI

http://dx.doi.org/10.1007/bf01292420

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1004788160


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