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Secondary neutrons as the main source of neutron-rich fission products in the bombardment of a thick U target by 1 GeV protons

  • A. E. BarzakhEmail author
  • G. Lhersonneau
  • L. Kh. Batist
  • D. V. Fedorov
  • V. S. Ivanov
  • K. A. Mezilev
  • P. L. Molkanov
  • F. V. Moroz
  • S. Yu. Orlov
  • V. N. Panteleev
  • Yu. M. Volkov
  • O. Alyakrinskiy
  • M. Barbui
  • L. Stroe
  • L. B. Tecchio
Regular Article - Experimental Physics

Abstract

The diffusion-effusion model has been used to analyse the release and yields of Fr and Cs isotopes from uranium carbide targets of very different thicknesses (6.3 and 148 g/cm2) bombarded by a 1 GeV proton beam. Release curves of several isotopes of the same element and production efficiency versus decay half-life are well fitted with the same set of parameters. Comparison of efficiencies for neutron-rich and neutron-deficient Cs isotopes enables separation of the contributions from the primary (p + 238U) and secondary (n + 238U) reactions to the production of neutron-rich Cs isotopes. A rather simple calculation of the neutron contribution describes these data fairly well. The FLUKA code describes the primary and secondary-reaction contributions to the Cs isotopes production efficiencies for different targets quite well.

Keywords

Proton Beam Release Curve Small Target Large Target Neutron Multiplicity 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© SIF, Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  • A. E. Barzakh
    • 1
    Email author
  • G. Lhersonneau
    • 2
  • L. Kh. Batist
    • 1
  • D. V. Fedorov
    • 1
  • V. S. Ivanov
    • 1
  • K. A. Mezilev
    • 1
  • P. L. Molkanov
    • 1
  • F. V. Moroz
    • 1
  • S. Yu. Orlov
    • 1
  • V. N. Panteleev
    • 1
  • Yu. M. Volkov
    • 1
  • O. Alyakrinskiy
    • 3
  • M. Barbui
    • 3
  • L. Stroe
    • 3
    • 4
  • L. B. Tecchio
    • 3
  1. 1.Petersburg Nuclear Physics Institute RASGatchinaRussia
  2. 2.GANILCaen Cedex 5France
  3. 3.INFN Laboratori Nazionali di LegnaroLegnaro, PadovaItaly
  4. 4.National Institute for Physics and Nuclear Engineering “Horia Hulubei”Magurele, BucharestRomania

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