title: Thermoluminescence properties of gamma-irradiated nano-structure hydroxyapatite.
abstract: The suitability of nano-structured hydroxyapatite (HAP) for use as a thermoluminescence dosimeter was investigated. HAP samples were synthesized using a hydrolysis method. The formation of nanoparticles was confirmed by X-ray diffraction and average particle size was estimated to be ~30 nm. The glow curve exhibited a peak centered at around 200 °C. The additive dose method was applied and this showed that the thermoluminescence (TL) glow curves follow first-order kinetics due to the non-shifting nature of Tm after different doses. The numbers of overlapping peaks and related kinetic parameters were identified from Tm -Tstop through computerized glow curve deconvolution methods. The dependence of the TL responses on radiation dose was studied and a linear dose response up to 1000 Gy was observed for the samples.
authors.affiliation: Department of Medical Radiation Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran.
authors.forename: M
authors.initials: M
authors.lastname: Shafaei
authors.affiliation: Radiation Application Research School, Nuclear Science & Technology Research Institute, Tehran, Iran.
authors.forename: F
authors.initials: F
authors.lastname: Ziaie
authors.affiliation: Department of Medical Radiation Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran.
authors.forename: D
authors.initials: D
authors.lastname: Sardari
authors.affiliation: Radiation Application Research School, Nuclear Science & Technology Research Institute, Tehran, Iran.
authors.forename: M M
authors.initials: MM
authors.lastname: Larijani
mesh_terms: D017886:Durapatite / Q000737:chemistry* / Q000528:radiation effects*; D005720:Gamma Rays; D049449:Luminescence; D049329:Nanostructures / Q000737:chemistry* / Q000528:radiation effects*; D013696:Temperature
chemical_list: D017886:Durapatite
keywords: deconvolution; hydroxyapatite; thermoluminescence; γ-ray