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Study of the Mo-Ba partition in 252Cf spontaneous fission

  • D.C. Biswas
  • R.K. Choudhury
  • M. Cinausero
  • B. Fornal
  • D.V. Shetty
  • G. Viesti
  • D. Fabris
  • E. Fioretto
  • M. Lunardon
  • G. Nebbia
  • G. Prete
  • D. Bazzacco
  • M. DePoli
  • D.R. Napoli
  • C.A. Ur
  • G. Vedovato
Nuclear structure and reactions

Abstract:

Measurements of fission fragment yields and neutron multiplicities have been carried out for the Mo-Ba fragment pairs in the spontaneous fission of 252Cf, using the γ-ray spectroscopy technique to analyze γ-γ-γ coincidence data. Prompt γ -ray multiplicities were also measured as a function of the number of neutrons emitted in the fission process leading to the Mo-Ba partition. We do not observe the enhancement in the yields of events with high neutron emission multiplicity (νn > 7) that has been associated to a second fission mode leading to the production of hyperdeformed Ba fragments, as reported in some earlier studies. The average γ-ray multiplicity is found to be rather weakly dependent on the number of neutrons emitted in the fission process.

PACS: 27.70.+q 150 < A < 189 – 21.10.Re Collective levels – 25.70.Gh Compound nucleus 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2000

Authors and Affiliations

  • D.C. Biswas
    • 1
  • R.K. Choudhury
    • 2
  • M. Cinausero
    • 3
  • B. Fornal
    • 4
  • D.V. Shetty
    • 2
  • G. Viesti
    • 1
  • D. Fabris
    • 1
  • E. Fioretto
    • 3
  • M. Lunardon
    • 1
  • G. Nebbia
    • 1
  • G. Prete
    • 3
  • D. Bazzacco
    • 1
  • M. DePoli
    • 3
  • D.R. Napoli
    • 3
  • C.A. Ur
    • 1
  • G. Vedovato
    • 3
  1. 1.Dipartimento di Fisica dell'Universitá and I.N.F.N., Sezione di Padova, 35131 Padova, ItalyIT
  2. 2.Bhabha Atomic Research Centre, Mumbai, IndiaIN
  3. 3.I.N.F.N. Laboratori Nazionali di Legnaro, 35020 Legnaro, ItalyIT
  4. 4.Institute of Nuclear Physics, Krakow, PolandPL

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