Band Crossings in 83Y Revisited

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Gamma rays from the reaction Si-28(Ni-58, 3p)83Y at a beam energy of 195 MeV were recorded in recoil-gamma- and gamma-gamma-coincidence mode with the POLYTESSA array and the Daresbury recoil mass separator. The known rotational bands were extended up to probable spins 49/2+ and 45/2-; many new interconnecting dipole transitions and an additional cascade were established. The bands are interpreted in terms of the cranked shell model; they exhibit two band crossings each, associated with g9/2 neutron and proton alignment. In the negative-parity yrast bands a strong signature inversion with DELTA-e' = -100 keV and a crossing pattern alternating in the favoured and unfavoured band develop. Hartree-Fock-Bogolyubov cranking calculations with a Woods-Saxon single-particle potential have been performed to illustrate the various shape changes and explain this signature inversion.


  • F. Cristancho
  • C. J. Gross
  • K. P. Lieb
  • Dirk Rudolph
  • O. Skeppstedt
  • M. A. Bentley
  • W. Gelletly
  • H. G. Price
  • J. Simpson
  • J. L. Durell
  • B. J. Varley
  • S. Rastikerdar
Externa organisationer
  • External Organization - Unknown

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Subatomär fysik
Sidor (från-till)307-327
TidskriftNuclear Physics, Section A
Utgåva nummer1-2
StatusPublished - 1992
Peer review utfördJa