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    • Keywords


      Activation cross-sections; mixed powder technique; statistical theory estimates; pre-equilibrium decay; neutron-induced reactions

    • Abstract


      With a view to study the pre-equilibrium effects in neutron-induced reactions, the activation cross-sections for (n, 2n) reactions at 14.2±0.2 MeV in the heavy mass region have been measured using the versatile mixed powder technique and high resolution Ge(Li) detection. The experimental cross-sections are found to be consistently smaller than the predictions based on the statistical theory and this is attributed to the effect of pre-equilibrium decay in these reactions. The cross-sections due to pre-equilibrium decay were estimated using exciton, hybrid and unified models. When this cross-section was included in comparing the experimental cross-sections with theory, we obtained better agreement, within the limitations of the present-day preequilibrium theories.

    • Author Affiliations


      N Lakshmana Das1 C V Srinivasa Rao1 2 B V Thirumala Rao1 J Rama Rao1 3

      1. Laboratories for Nuclear Research, Andhra University, Waltair, Visakhapatnam - 530 003, India
      2. Department of Physics, Indian Institute of Technology, Kanpur - 208 016, India
      3. Department of Physics, Banaras Hindu University, Varanasi - 221 005, India
    • Dates

  • Pramana – Journal of Physics | News

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