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Zeitschrift für Physik A Hadrons and Nuclei

, Volume 354, Issue 3, pp 287–291 | Cite as

Pre- and post-scission neutron emission in the reaction180Hf(40Ar, fission) atE lab=216 MeV

  • A. V. Kuznetsov
  • V. A. Rubchenya
  • D. N. Vakhtin
  • V. G. Lyapin
  • I. D. Alkhazov
  • S. V. Khlebnikov
  • O. I. Osetrov
  • G. P. Tiourin
  • W. H. Trzaska
  • J. Äystö
Article
  • 18 Downloads

Abstract

Neutron and fission fragment spectra following the180Hf(40Ar,f) reaction atE lab=216MeV were measured. The following neutron total, pre- and post-scission multiplicities were extracted:M n tot =7.2±1.3,M n pre =2.7±0.9,M n post =4.5±0.9. The average temperature parameters of the neutron spectra areT pre=(1.63±0.16) MeV andT post=(1.14±0.26)MeV. The mean total kinetic energy of the fission fragments is TKE=(166±10) MeV and the measured width is σTKE=17.3MeV. The width of the fragment mass distribution is σ A =18.3u. The same reaction was analyzed using a modified statistical code which includes nuclear dissipation effects and particle and γ-ray emission in the equilibrium compound nucleus state and saddle-to-scission transition. The extracted value of nuclear friction coefficient indicates over-damped large-scale fission motion. The obtained total fission time τfiss=9·10−20s is in agreement with other existing data.

PACS

25.70 25.85 

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Copyright information

© Springer-Verlag 1996

Authors and Affiliations

  • A. V. Kuznetsov
    • 1
  • V. A. Rubchenya
    • 1
  • D. N. Vakhtin
    • 1
  • V. G. Lyapin
    • 1
  • I. D. Alkhazov
    • 1
  • S. V. Khlebnikov
    • 1
  • O. I. Osetrov
    • 1
  • G. P. Tiourin
    • 1
  • W. H. Trzaska
    • 2
  • J. Äystö
    • 2
  1. 1.V.G. Khlopin Radium InstituteSt. PetersburgRussian Federation
  2. 2.Accelerator LaboratoryUniversity of JyväskyläJyväskyläFinland

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