Thermoluminescence properties of two natural colorful fluorite samples of Anatolian origin for dosimetric applications

摘要

Two different fluorite samples of Turkish origin were studied with respect to their thermoluminescence properties suitable for dosimetric applications. The fluorites are colorful and naturally occurring. Both samples indicate sensitivity comparable to the sensitivity of CaF_2:N material, and PXRD and XRF measurements could help to understand the sensitivity differences between these two samples. Deconvolution and fractional glow techniques indicated useful convergent information regarding the trapping parameters of the corresponding peaks. The dose response features were studied only for the appropriate for dosimetry thermoluminescence peaks, after deconvolution, for two different cases: (a) promptly after irradiation and (b) for the residual signal after 100 s of bleaching. The results showed that specific thermoluminescence peaks of both materials could be effectively used for dosimetric applications within the dose range of 10~(-3)-50 Gy. Finally, a specific peak with derealization temperature 338 ℃ is promising for dosimetric applications within the same dose range even using the residual TL signal after 100 s illumination.