Synthesis and Thermoluminescence Characteristics of CaF2:Dy,Tm Nanoparticles

Abstract

: CaF2:Dy,Tm nanoparticles have been synthesized by the hydrothermal method. The cubic lattice structure has been confirmed by the X-ray diffraction (XRD) pattern and an average size of 37 nm is obtained using Deby-Schere`s formula. The shape and size of particles are also observed by scanning electron microscopy (SEM). The thermoluminescence (TL) glow curve of the produced nanoparticles contains three overlapping glow peaks at approximately 407, 440 and 485 K. The TL phosphor characteristics has been studied for different Dy and Tm concentrations and the maximum sensitivity has been obtained at 3 mol% and 0.5 mol% of dysprosium and thulium impurities, respectively. The linear TL dose response over the absorbed dose rate of 10000 Gy, is recommend to be applied as a good candidate for high dose dosimetry.

Keywords

• nanoparticles
• thermoluminescence
• synthesis
• hydrothermal method