Deformations and Shape Changes in 81Y

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

Abstract

High spin states in Y-81 UP to the probable 33/2(+) and 29/2(-) yrast states have been measured via the reaction Ni-58(Si-28, alpha p), using the Cologne tandem accelerator. Directional correlations of oriented nuclei were determined and the level scheme was extended with lifetimes measured by means of DSA and recoil distance techniques. Reduced transition strengths inferred from lifetimes were consistent with the results of Hartree-Fock-Bogolyubov calculations, which predict a nearly axially symmetric deformation of beta(2) approximate to 0.37 for the pi = + band. Predictions reveal an alignment driving the system to a smaller and triaxial deformation with beta(2) = 0.23 and gamma = -30 degrees, although the data show this crossing to be somewhat delayed. Particle-rotor calculations for the one-quasiparticle bands corroborate the predictions of deformation parameters based on the cranking model.

Detaljer

Författare
  • T. D. Johnson
  • A. Raguse
  • C. J. Gross
  • M. K. Kabadiyski
  • K. P. Lieb
  • Dirk Rudolph
  • M. Weiszflog
  • T. Burkardt
  • J. Eberth
  • S. Skoda
Externa organisationer
  • External Organization - Unknown
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Subatomär fysik
Originalspråkengelska
Sidor (från-till)189-197
TidskriftZeitschrift für Physik A Hadrons and Nuclei
Volym350
Utgåva nummer3
StatusPublished - 1994
PublikationskategoriForskning
Peer review utfördJa