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Claes Fahlander

Professor emeritus

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Excitation strengths in Sn-109: Single-neutron and collective excitations near Sn-100

Author

  • Douglas DiJulio
  • Joakim Cederkäll
  • Claes Fahlander
  • Andreas Ekström
  • M. Hjorth-Jensen
  • M. Albers
  • V. Bildstein
  • A. Blazhev
  • I. Darby
  • T. Davinson
  • H. De Witte
  • J. Diriken
  • Ch. Fransen
  • K. Geibel
  • R. Gernhaeuser
  • A. Gorgen
  • H. Hess
  • J. Iwanicki
  • R. Lutter
  • P. Reiter
  • M. Scheck
  • M. Seidlitz
  • S. Siem
  • J. Taprogge
  • G. M. Tveten
  • J. Van de Walle
  • D. Voulot
  • N. Warr
  • F. Wenander
  • K. Wimmer
Show all

Summary, in English

A set of B(E2) values for the low-lying excited states in the radioactive isotope Sn-109 were deduced from a Coulomb excitation experiment. The 2.87-MeV/u radioactive beam was produced at the REX-ISOLDE facility at CERN and was incident on a secondary Ni-58 target. The B(E2) values were determined using the known 2(+) -> 0(+) reduced transition probability in Ni-58 as normalization with the semiclassical Coulomb excitation code GOSIA2. The transition probabilities are compared to shell-model calculations based on a realistic nucleon-nucleon interaction and the predictions of a simple core-excitation model. This measurement represents the first determination of multiple B(E2) values in a light Sn nucleus using the Coulomb excitation technique with low-energy radioactive beams. The results provide constraints for the single-neutron states relative to Sn-100 and also indicate the importance of both single-neutron and collective excitations in the light Sn isotopes.

Department/s

  • Nuclear physics

Publishing year

2012

Language

English

Publication/Series

Physical Review C (Nuclear Physics)

Volume

86

Issue

3

Document type

Journal article

Publisher

American Physical Society

Topic

  • Subatomic Physics

Status

Published

ISBN/ISSN/Other

  • ISSN: 0556-2813