Study the Behavior of Some EPR Dosimeters under Different Energies Range

An investigation has been done to study the response of various Electron Paramagnetic Resonance (EPR) dosimeters (Alanine, Ammonium tartrate, Lithium oxalate, Sodium carbonate, potassium methionate, Strontium sulfate, Barium dithionate) focusing on low and intermediate photon energy. Different gamma sources of energy ranging from 0.021 to 1.25 MeV (103Pd, 170Tm, 99Tc, 192Ir, 137Cs, 65Zn, and 60Co) which are commonly applied in radiation technology applications were used. A significant variation appeared on the effective atomic number Zeff value due to the variations in the dominance of photon interaction process at different energy regions. Compton scattering is a dominant mode of photon interaction, the Zeff can be represented by a mean effective atomic number. A comparison between the results obtained from Auto-Zeff software and single value XMuDat program was discussed.