Abstract
The synthesis of Ce and Dy doped CaF2 phosphor (CaF2:Ce,Dy) was performed by chemical reaction with calcium carbonate by using hydrofluoric acid in a stoichiometric ratio. At 0.40 and 0.40mol% concentration of Ce and Dy respectively in the CaF2 matrix, the doped phosphor was highly sensitive in powder and pellet form. Morphological, crystallographic and optical characteristics were studied by low vacuum scanning electron microscopy, X-ray diffraction, and Raman and photoluminescence spectroscopies. Results show that this new phosphor is ten times more sensitive to gamma radiation than the well-known TLD-100. The linearity of the thermoluminescent response to gamma radiation was between 0.001–500Gy, followed by a saturation region. Fading was negligible after two months storage. The repeatability of the pellets under the readout heating cycles was performed according to the standard recommendations. In addition, the kinetic parameters were determined by glow curve deconvolution. The results reported that this newly developed CaF2:Ce,Dy+PTFE phosphor offers high sensitivity at low doses, which is very useful in dosimetry.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
