Multiparticle-hole States of High Spin in N

Research output: Contribution to journalArticle

Abstract

High spin states in the nucleus Tc-89 have been studied via the fusion evaporation reaction Ni-58(Ca-40,2 alpha p)Tc-89 at 180 MeV beam energy. The NORDBALL gamma-ray spectrometer equipped with auxiliary detectors for light particle selection was used to measure gamma gamma- and particle-gamma gamma coincidences. Some 60 transitions were placed into a level scheme comprising 38 levels reaching up to 9.2 MeV excitation energy and a possible spin of I = 45/2HBAR The level scheme is compared to those of neighbouring nuclei and interpreted in terms of the spherical shell model. The calculations were performed with different sets of parameters within a restricted pi(p(1/2)), pi(g(9/2)), nu(p(1/2)) and nu(g(9/2)) configuration space. States above 2.3 MeV excitation energy are well reproduced by shell model calculations based on an empirical residual interaction, whereas collective excitations are suggested to contribute to the wave functions of lower lying states.

Details

Authors
  • Dirk Rudolph
  • A. Harder
  • T. D. Johnson
  • K. P. Lieb
  • R. Schubart
  • D. Foltescu
  • H. A. Roth
  • O. Skeppstedt
  • I. G. Bearden
  • T. Shizuma
  • G. Sletten
  • H. Grawe
  • J. Persson
  • D. Seweryniak
External organisations
  • External Organization - Unknown
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Subatomic Physics
Original languageEnglish
Pages (from-to)181-201
JournalNuclear Physics, Section A
Volume587
Issue number1
Publication statusPublished - 1995
Publication categoryResearch
Peer-reviewedYes

Bibliographic note

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