Activation of dosimetry foils in the NPI Rez p-D_(2)O neutron field of the IFMIF-like spectrum

摘要

The work aims at integral tests on activation foils selected for neutron dosimetry of IFMIF (International Fusion Material Irradiation Facility) neutron field. Various packets of foils were irradiated in the neutron field of the cyclotron-based high-power fast neutron source at the NPI Rez. The IFMIF-like neutron spectrum determined from 2.5 to 32 MeV employing the scintillator detector technique was produced by irradiation of thick heavy water flowing target by the 37 MeV/12 μA proton beam. Activated foils were investigated at different cooling times by γ spectrometry technique with two HPGe detectors. Reaction rates for wide set of dosimetry reactions were adjusted. Both, the methodical approach and the data reduction are demonstrated for the Au nuclide. Beside, the accuracy and reliability of nuclear spectroscopy data are discussed. The work was performed in close collaboration with specialists from ENEA-Frascati (Italy).