Thermoluminescent dosimetric properties of CaF2:Tm produced by combustion synthesis

• Published in: Radiation physics and chemistry (Oxford, England : 1993) Vol. 121; pp. 75 - 80
• Main Authors: de Vasconcelos, D.A.A., Barros, V.S.M., Khoury, H.J., Asfora, V.K., Oliveira, R.A.P.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.04.2016
• Subjects: Calcium fluoride; Combustion synthesis; Thermoluminescent dosimeter; Combustion synthesis; Thermoluminescent dosimeter; Calcium fluoride
• ISSN: 0969-806X; 1879-0895
• DOI: 10.1016/j.radphyschem.2015.12.017

Calcium Fluoride is one of the oldest known thermoluminescent materials and is considered to be one of the most sensitive. This work presents the dosimetric properties results of CaF2:Tm produced by combustion synthesis. The X-ray diffraction confirmed that CaF2 was successfully produced. TL emission spectra, obtained using a Hammamatsu optical spectrometer, have the same lines of commercial CaF2:Tm, although transitions 3P0→3F4 (455nm) and 1G4→3H6 (482nm) are shown to be proportionally more intense. The deconvolution technique was employed and seven glow peaks were found similar to the commercial CaF2:Tm. A linear dose response curve was obtained for the range 0.1mGy to 100Gy, with the onset of a supralinear behavior at 50Gy up to 100Gy. The minimum measurable dose for gamma was around 100μGy for a 6.0mm diameter by 1.0mm in thickness pellet. No significant fading was observed in 60 days of storage, within experimental uncertainties, showing that the main dosimetric peak is stable. •CaF2:Tm was successfully prepared by combustion synthesis.•Optimum synthesis preparation conditions were demonstrated.•A unique thermoluminescent spectra were observed for combustion sinthesized CaF2.•A linear dose response was observed from 100µGy to 100Gy.