Heavy-ion In-beam Studies of the Nucleus 87Nb

Research output: Contribution to journalArticle

Abstract

High spin states in the transitional nucleus Nb-87 up to 14 MeV excitation have been established for the first time via the reactions Ca-40(Cr-50, 3p)Nb-87 and Ni-58(S-32, 3p)Nb-87. The Nb-87 gamma-radiations have been identified through gamma-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, gamma-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 aligned g9/2 nucleons. Moderately enhanced E2 in-band transitions of 13-48 W.u. as well as several weak E2 yrast transitions connecting bands with different quasiparticle numbers have been found. Similarities with respect to the N = 46 isotones Rb-83, Sr-84, Y-85, Zr-86 and 88Mo are discussed. PACS: 21.10.R; 23.20.ck; 27.50. + e

Details

Authors
  • A. Jungclaus
  • K. P. Lieb
  • C. J. Gross
  • J. Heese
  • Dirk Rudolph
  • D. J. Blumenthal
  • P. Chowdhury
  • P. J. Ennis
  • C. J. Lister
  • C. Winter
  • J. Eberth
  • S. Skoda
  • M. A. Bentley
  • W. Gelletly
  • B. J. Varley
External organisations
  • External Organization - Unknown
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Subatomic Physics
Original languageEnglish
Pages (from-to)125-139
JournalZeitschrift für Physik A Hadrons and Nuclei
Volume340
Issue number2
StatePublished - 1991
Peer-reviewedYes

Bibliographic note

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