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  • 1995-1999  (2)
  • 25.28.−W  (1)
  • PACS: 25.70.Jj Fusion and fusion-fission reactions – 25.85.Ge Charged-particle-induced fission  (1)
Datenquelle
Materialart
Erscheinungszeitraum
  • 1995-1999  (2)
Jahr
Schlagwörter
  • 1
    Digitale Medien
    Digitale Medien
    Two mode fission: Existence of two independent paths in the fission of actinide elements (1995)
    Springer
    The European physical journal 353 (1995), S. 35-42 
    Details
    ISSN: 1434-601X
    Schlagwort(e): 25.28.−W ; 25.28.Ge
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract We attempted to confirm the existence of two-mode-fission mechanism in the232Th and238U plus4He systems. Angular distributions and differential ranges of the fission fragments were measured for both systems. Two distinct groups, symmetric and asymmetric, were observed in the anisotropy of the fragments obtained from the angular distributions in either systems. Kinetic energies of the fragments were deduced from the measured ranges and the effective distances were calculated from the data. The distribution of the resulting distances was classified into two groups also, indicating the existence of the symmetric and asymmetric modes. This strongly suggests existence of two independent paths in the fission process.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01297725
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  • 2
    Digitale Medien
    Digitale Medien
    Fast fission mechanism and duality of the diffusion process (1998)
    Springer
    The European physical journal 3 (1998), S. 281-292 
    Details
    ISSN: 1434-601X
    Schlagwort(e): PACS: 25.70.Jj Fusion and fusion-fission reactions – 25.85.Ge Charged-particle-induced fission
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract: The reaction of 238U with 12C was studied radiochemically with the purpose of elucidating fast fission characteristics. From the difference in the mass distribution below and above the critical energy where fast fission is predicted to set in, fast fission component was extracted in far-asymmetric mass region and interpreted as the mass diffusion following the Fokker-Planck equation. Anomalous charge dispersion widths in the corresponding mass region and a sudden increase of the whole mass distribution width at the critical energy were also observed to support the above result. The reaction time of fast fission deduced from the width and position of the mass distribution was 5×10−21s as well by taking into account the effect of neutron emission during the diffusion process, which turned out to be more than one order of magnitude longer than the corresponding life time of typical deep inelastic scattering but substantially short compared to ordinary fusion-fission life time. Evaluation of the driving potential for mass drift required dinuclear configuration be of an elongated or deformed form for fast fission in contrast to a more compact form for the deep-inelastic process.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s100500050179
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