Faire avancer la sûreté nucléaire

La Recherchev2


Calibration of EPR signal dose response of tooth enamel to photons : experiment and Monte Carlo simulation.



Email :

Mot de passe :

AI. Ivannikov, DD. Tikunov, NB. Borysheva, F. Trompier, VG. Skvortsov, VF. Stepanenko, M. Hoshi, Radiation Protection Dosimetry.2004;108(4):303-15.

Type de document > *Article de revue

Mots clés > dosimétrie, étalonnage

Unité de recherche > IRSN/DRPH/SDE/LDRI

Auteurs > TROMPIER François

Date de publication > 01/04/2004


Medical Radiological Research Centre, Korolyov str., 4, Obninsk 249036, Russia.

The experimental energy dependence of the electron paramagnetic resonance (EPR) radiation-induced signal at irradiation by photons in the energy range of 13 keV-1.25 MeV was analysed in terms of the absorbed dose in human tooth enamel. The latter was calculated using a Monte Carlo simulation of the photon and electron transport. The dependence of the calculated absorbed dose on the sample thickness was analysed. No energy dependence of the EPR signal on the absorbed dose in enamel was verified in the range of 37 keV-1.25 MeV. At 13 and 20 keV the EPR signal dose response was reduced by 8% probably due to sample powdering. Dose-depth profiles in enamel samples irradiated by 1.25 MeV photons in polymethylmethacrylate and aluminium build-up materials were calculated. It was concluded that secondary electron equilibrium conditions are better fulfiled for irradiation in aluminium, which makes this material preferable for calibration.