Rotational bands in 77Rb: Spectroscopy near the Z=38 deformed shell gap

A. Harder, A. Jungclaus, M. K. Kabadiyski, D. Kast, K. P. Lieb, D. Rudolph, M. Weiszflog, T. D. Johnson, G. Winter, C. J. Gross, R. A. Cunningham, W. Gelletly, J. Simpson, D. D. Warner, I. G. Bearden, T. Shizuma, G. Sletten, D. Foltescu, H. A. Roth, Ö. Skeppstedt, and B. J. Varley
Phys. Rev. C 55, 1680 – Published 1 April 1997
PDFExport Citation

Abstract

The γ decays of high spin states in 77Rb populated in the reaction 40Ca(40Ca,3p)77Rb were studied with the EUROGAM I γ-ray spectrometer at Daresbury Laboratory, in conjunction with the recoil mass separator. The data were used to extend or establish three positive parity and five negative parity bands in 77Rb. Level lifetimes and sidefeeding times were then measured with the NORDBALL γ-ray spectrometer, using the Doppler shift attenuation method. A very detailed level scheme including many weakly populated states was established and the bands were observed over large spin ranges. The deduced lifetimes demonstrate the high collectivity of the excited states and are consistent with their having large prolate deformations. The structures of the bands and their crossings are discussed in relation to the large shell gap at prolate deformation β20.4.

  • Received 13 November 1996

DOI:https://doi.org/10.1103/PhysRevC.55.1680

©1997 American Physical Society

Authors & Affiliations

A. Harder1, A. Jungclaus1, M. K. Kabadiyski1, D. Kast1, K. P. Lieb1, D. Rudolph1, M. Weiszflog1, T. D. Johnson1, G. Winter2, C. J. Gross3, R. A. Cunningham4, W. Gelletly4, J. Simpson4, D. D. Warner4, I. G. Bearden5, T. Shizuma5, G. Sletten5, D. Foltescu6, H. A. Roth6, Ö. Skeppstedt6, and B. J. Varley7

  • 1II. Physikalisches Institut, Universität Göttingen, D-37073 Göttingen, Germany
  • 2Forschungszentrum Rossendorf, D-01314 Dresden, Germany
  • 3Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
  • 4Daresbury Laboratory, Warrington WA4 4AD, United Kingdom
  • 5Niels Bohr Institute, DK-4000 Roskilde, Denmark
  • 6Department of Physics, Chalmers University of Technology, S-412 96 Göteborg, Sweden
  • 7Schuster Laboratory, University of Manchester, Manchester M13 9PL, United Kingdom

References (Subscription Required)

Click to Expand
Issue

Vol. 55, Iss. 4 — April 1997

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review C

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×