High-spin Spectroscopy Near the Deformed N~Z~38 Shell Gap: The Light Rb Isotopes

Research output: Contribution to journalArticle


Nuclei near the prolate single-particle energy gap at proton number Z = 38 (epsilon(2) approximate to +0.38) and neutron number N approximate to Z offer unique possibilities to study the pn-interaction at large quadrupole deformation, In the yrast band of the Z = N = 37 nucleus Rb-74, We have identified a crossing of the T = 1 pn-paired band (even spins) with the T = 0 pn-unpaired band (odd spins). In Rb-77, the positive-parity yrast and yrare bands have been followed over large spin ranges and assigned different 1qp-proton 2qp-neutron structures. These band crossings do not follow the usual pattern of two identical particles aligning in high-j orbits, In addition, an aligned g(9/2) proton-neutron negative-parity sequence with K = 11/2 has been identified in Rb-77 Rotational bands with more conventional band crossings have also been found.


  • K. P. Lieb
  • A. Harder
  • Dirk Rudolph
  • F. Donau
  • W. Gelletly
  • C. J. Gross
  • A. Jungclaus
  • J. A. Sheikh
External organisations
  • External Organization - Unknown
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Subatomic Physics
Original languageEnglish
Pages (from-to)101-110
JournalProgress in Particle and Nuclear Physics
Publication statusPublished - 1997
Publication categoryResearch