Identification and Structure of High-spin Particle-hole States in 89Mo

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Particle-gammagamma and gammagamma-coincidences of the reaction Ni-58(Ar-36, 4 pn)89Mo have been used to gain more information about high spin states in 89Mo and to establish the yrast sequence up to 7.6 MeV excitation energy and probable spin 37/2 h. Spins and parities were assigned on the basis of DCO-ratios measured with the OSIRIS spectrometer and a large volume Ge detector placed at 162-degrees to the beam. Furthermore, a gamma-ray angular distribution experiment was carried out using the reaction Ni-58(Cl-35, 3 pn)89Mo. As in the neighboring isotopes 88Mo and Mo-90, the positive-parity high-spin states can be grouped into shell model multiplets characterized by increasing seniorities of proton particles and neutron holes in the 1 g9/2 shell. The negative-parity states can be explained with one nucleon moving in the P1/2 orbit. The energies and wave functions of these states have been deduced by means of the shell model code RITSSCHIL. The 2584 keV (21/2+) is an isomeric state the mean life of which has been estimated from delayed gammagamma-coincidences.


  • M. Weiszflog
  • Dirk Rudolph
  • C. J. Gross
  • M. K. Kabadiyski
  • K. P. Lieb
  • H. Grawe
  • J. Heese
  • K. H. Maier
  • J. Eberth
  • S. Skoda
External organisations
  • External Organization - Unknown
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Subatomic Physics
Original languageEnglish
Pages (from-to)395-403
JournalZeitschrift für Physik A Hadrons and Nuclei
Issue number4
Publication statusPublished - 1993
Publication categoryResearch

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