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Zeitschrift für Physik A Hadrons and Nuclei

, Volume 340, Issue 2, pp 125–139 | Cite as

Heavy-ion in-beam studies of the nucleus87Nb

  • A. Jungclaus
  • K. P. Lieb
  • C. J. Gross
  • J. Heese
  • D. Rudolph
  • D. J. Blumenthal
  • P. Chowdhury
  • P. J. Ennis
  • C. J. Lister
  • Ch. Winter
  • J. Eberth
  • S. Skoda
  • M. A. Bentley
  • W. Gelletly
  • B. J. Varley
Nuclear Structure and Reactions

Abstract

High spin states in the transitional nucleus87Nb up to 14 MeV excitation have been established for the first time via the reactions40Ca(50Cr, 3p)87Nb and58Ni (32S, 3p)87Nb. The87Nbγ-radiations have been identified throughγ-ray spectra taken in coincidence with the evaporation residues detected in the Daresbury recoil separator or with multiple proton emission. Gamma-gamma coincidences, DCO ratios,γ-ray angular distributions and lifetimes have been measured. A total of some 100 transitions have been placed into a level scheme comprising of sixty states. The one-quasiparticle (1qp) bands of either parity and several other band-like structures have been identified, some containing alignedg9/2 nucleons. Moderately enhancedE2 in-band transitions of 13–48 W.u. as well as several weakE2 yrast transitions connecting bands with different quasiparticle numbers have been found. Similarities with respect to theN=46 isotones83Rb,84Sr,85Y,86Zr and88Mo are discussed.

PACS

21.10.R 23.20.ck 27.50. + e 

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Copyright information

© Springer-Verlag 1991

Authors and Affiliations

  • A. Jungclaus
    • 1
  • K. P. Lieb
    • 1
  • C. J. Gross
    • 1
  • J. Heese
    • 1
  • D. Rudolph
    • 1
  • D. J. Blumenthal
    • 2
  • P. Chowdhury
    • 2
  • P. J. Ennis
    • 2
  • C. J. Lister
    • 2
  • Ch. Winter
    • 2
  • J. Eberth
    • 3
  • S. Skoda
    • 3
  • M. A. Bentley
    • 4
  • W. Gelletly
    • 4
  • B. J. Varley
    • 5
  1. 1.II. Physikalisches InstitutUniversität GöttingenGöttingenFederal Republic of Germany
  2. 2.A.W. Wright Nuclear Structure LaboratoryYale UniversityNew HavenUSA
  3. 3.Institut für KernphysikUniversität zu KölnKöln 41Federal Republic of Germany
  4. 4.Daresbury LaboratorySERC Nuclear Structure FacilityWarringtonUK
  5. 5.University of ManchesterManchesterUK

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