Photon energy dependence of self-fabricated TLD-CaSO4 : Dy/Teflon discs

Thermoluminescent dosimeter-CaSO4 Teflon discs were prepared by the authors. Series of experiments were applied to investigate the photon energy dependence of these TLD discs. The results showed that the energy dependence of TLD discs is almost the same as that of TLD powder. The decrease of the proportion of TL phosphor embedded in teflon does reduce the sensitivity but not affect the energy dependence of TLD discs unless the grain size of TL phosphor is smaller than several microns. A personnel beta-gamma dosimeter in connection with proper filters was designed. The photon energy dependence can be corrected and the effects of beta and gamma can be distinguished in this dosimeter. (author)