Abstract
In this work, the efficiency eta of CR-39 track detector for fast neutron registration was measured and compared with the calculated one. eta was defined as the ratio of induced proton tracks in CR-39 detector to the incident neutron flux taken into account the neutron scattering cross-section of the reaction.
In this study, a 5 Ci Am-241-Be cylindrical shaped neutron source was used and different theoretical approaches for flux evaluation were considered. It was found that at small source-to-detector distances (less than or equal to 90 cm) the cylindrical source configuration should only be considered in neutron flux calculations and absolute dosimetry evaluation. Also, a good agreement between the calculated and the measured values of eta has been found. Moreover, calculated neutron doses have shown excellent agreement with those measured by track detectors and by a Secondary Standard Neutron Monitor. (C) 2003 Elsevier B.V. All rights reserved.