Journal of Nuclear Science, Engineering and Technology (JONSAT)
In cooperation with the Iranian Nuclear Society

Preparation of CaF2 Thermoluminescence Dosimeter and Investigating of the Influence of Dy Impurity in it’s Dosimetric Properties

Document Type : Research Paper

Authors

M Gholampoor
J Gheisari
Gh Mirjalili
M.A Shafaie
l shekari
A.R Moini
A Shahvar
Abstract
In this study, CaF2 pellet samples were prepared and its thermoluminescence (TL) properties were investigated after gamma irradiation. The TL glow curve of the CaF2 pellet has four peaks at around 135, 170, 260 and 370ºC for the heating rate of 10ºC/S. The main peak occurs at 260ºC. The sensivity of CaF2 and Dy doped CaF2 were examined. The observed TL sensivity of the prepared CaF2 pellet is abut five times than that of TLD-100. The sensivity of the Dy doped CaF2 is approximately 18 times higher than that of TLD-100. The fading is approximately 13% in one day, 36% in two days and 50% in 500 hours. These examinations repeated for 10 times and all the results were found to be consistant. These properties make the CaF2 pellets a useful can dilate for γ-ray irradiation dosimetry applications.

Highlights

 

  1. S.W.S. McKeever, M. Moscivitch, P.D. Townsend, “THERMOLUMINESCENCE DOSIMETRY MATERIALS: PROPERTIES AND USES,” Nuclear Technology Publishing, Ashford, Kent, 74-79, 109-111 (1995).

     

  2. B. Marczewska, P. Bilski, M. Budzanowski, P. Olko, V. Chernov, “Dosimetry properties of Tm-doped single CaF2 crystals,” Radiation Measurements, Vol. 33, 571-576 (2001).

     

  3. J. Manrique, S. Angulo, M.P. Pardo, R.Gastesi, A. Dela Cruz, A. Perez, “Thermoluminescence spectra of natural CaF2 irradiated by 10MeV electrons,” Radiation Measurements, Vol. 41 145-153 (2006).

     

  4. C.C. Guimarães, E.Okuno, “Blind performance testing of personal and environmental dosimeters based on TLD-100 and natural CaF2: NaCl,” Radiation Measurements, Vol. 37 127-132 (2003).

     

  5. F.O. Ogundare, F.A. Balogun, L.A. Hussain, “Kinetic characterization of the thermoluminescence of natural fluorite,” Radiation Measurements, Vol. 38, 281–286 (2004).

Keywords

Calcium Fluoride
Thermoluminescence Dosimeter
Dy
Glow Curve
Sensitivity
Fading

  1.  

    1. S.W.S. McKeever, M. Moscivitch, P.D. Townsend, “THERMOLUMINESCENCE DOSIMETRY MATERIALS: PROPERTIES AND USES,” Nuclear Technology Publishing, Ashford, Kent, 74-79, 109-111 (1995).

       

    2. B. Marczewska, P. Bilski, M. Budzanowski, P. Olko, V. Chernov, “Dosimetry properties of Tm-doped single CaF2 crystals,” Radiation Measurements, Vol. 33, 571-576 (2001).

       

    3. J. Manrique, S. Angulo, M.P. Pardo, R.Gastesi, A. Dela Cruz, A. Perez, “Thermoluminescence spectra of natural CaF2 irradiated by 10MeV electrons,” Radiation Measurements, Vol. 41 145-153 (2006).

       

    4. C.C. Guimarães, E.Okuno, “Blind performance testing of personal and environmental dosimeters based on TLD-100 and natural CaF2: NaCl,” Radiation Measurements, Vol. 37 127-132 (2003).

       

    5. F.O. Ogundare, F.A. Balogun, L.A. Hussain, “Kinetic characterization of the thermoluminescence of natural fluorite,” Radiation Measurements, Vol. 38, 281–286 (2004).

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