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    • Keywords


      Induced activity; ALICE; EMPIRE; pre-equilibrium; excitation function.

    • Abstract


      Induced radioactivity in natural indium ($^{\text{nat}}$In) foils by high energy neutrons was measured at the KENS Facility, KEK, Japan, where a 16.7 cm thick W target was bombarded by protons of 500 MeV. High energy neutrons consequently produced irradiated the In targets placed at different depths inside a 4 m thick concrete shield placed at the beam exit. The measured activities were compared with the results calculated using the nuclear reaction model codes ALICE-91 and EMPIRE-2.18. To estimate the induced activity, excitation functions of the various radionuclides were calculated using the two codes and folded with the appropriate neutron energy distribution at different depths of the concrete shield. The calculated excitation functions of a given nuclide were found to vary widely from one another in some cases. The performances of the codes for different input parameters like level densities and inverse cross-sections are reported in this paper. Our analysis shows that neither of the two codes reproduced all the measured activities satisfactorily, requiring further improvements in the models adopted.

    • Author Affiliations


      Maitreyee Nandy1 P K Sarkar2 N Nakao3 T Shibata3 4

      1. Chemical Sciences Division, Saha Institute of Nuclear Physics, 1/AF, Bidhan Nagar, Kolkata 700 064, India
      2. ARSS, BARC & H.P. Unit, V.E.C. Centre, 1/AF, Bidhan Nagar, Kolkata 700 064, India
      3. Radiation Science Center, High Energy Accelerator Research Organisation, KEK, Tsukuba, Japan
      4. J-PARC Center, Japan Atomic Energy Agency, Tokai, Ibaraki, Japan
    • Dates

  • Pramana – Journal of Physics | News

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