Abstract
A personal imaging plate (IP) dosimeter is in the process of being developed for neutron fields using the BaFBr: Eu 2 + phosphor. A configuration incorporating a polyethylene radiator placed before the IP detector is used to produce protons via (n,p) elastic scattering. For a dosimeter sensitive to thermal neutrons, a Nylon plate ( 100 μ m thick) is placed between the polyethylene (1.2 mm thick) radiator and the IP ( 130 μ m thick sensitive layer) detector to produce protons via the 14 N ( n , p ) 14 C reaction. Dosimeters having these configurations have been exposed to neutrons from 241 Am –Be and 252 Cf sources at the Institute for Radioprotection and Nuclear Safety of Cadarache at angles of 0 ∘ (normal incidence), 30 ∘ and 60 ∘ and several dose equivalents. The personal dose equivalent response in terms of H p ( 10 ) is evaluated from the net measured photostimulated luminescence densities ( PSL mm - 2 ). The calibration factor obtained for estimating the personal dose equivalent with this dosimeter is 9.20 × 10 - 5 mSv PSL - 1 mm 2 for 241 Am –Be and 13.07 × 10 - 5 mSv PSL - 1 mm 2 for 252 Cf .
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