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Claes Fahlander

Professor emeritus

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Experimental approach towards shell structure at Sn-100 and Ni-78

Author

  • H Grawe
  • M Gorska
  • Claes Fahlander
  • M Palacz
  • F Nowacki
  • E Caurier
  • JM Daugas
  • M Lewitowicz
  • M Sawicka
  • R Grzywacz
  • K Rykaczewski
  • O Sorlin
  • S Leenhardt
  • F Azaiez
Show all

Summary, in English

The status of experimental approach to Sn-100 and Ni-78 is reviewed. Revised single particle energies for neutrons are deduced for the N=Z=50 shell closure and evidence for low lying I-pi=2(+) and 3(-) states is presented. Moderate E2 polarization charges of 0.1 e and 0.6 e are found to reproduce the experimental data when core excitation of Sn-100 is properly accounted for in the shell model. For the neutron rich Ni region no conclusive evidence for an N=40 subshell is found, whereas firm evidence for the persistence of the N=50 shell at Ni-78 is inferred from the existence of seniority isomers. The disappearance of this isomerism in the mid nug(9/2) shell is discussed.

Department/s

  • Nuclear physics

Publishing year

2002

Language

English

Pages

211-222

Publication/Series

Nuclear Physics, Section A

Volume

704

Document type

Journal article

Publisher

Elsevier

Topic

  • Subatomic Physics

Status

Published

Research group

  • Nuclear Structure

ISBN/ISSN/Other

  • ISSN: 0375-9474