title: Thermoluminescence responses of photon- and electron-irradiated lithium potassium borate co-doped with Cu+Mg or Ti+Mg.
abstract: New glasses Li2CO3-K2CO3-H3BO3 (LKB) co-doped with CuO and MgO, or with TiO2 and MgO, were synthesized by the chemical quenching technique. The thermoluminescence (TL) responses of LKB:Cu,Mg and LKB:Ti,Mg irradiated with 6 MV photons or 6 MeV electrons were compared in the dose range 0.5-4.0 Gy. The standard commercial dosimeter LiF:Mg,Ti (TLD-100) was used to calibrate the TL reader and as a reference in comparison of the TL properties of the new materials. The dependence of the responses of the new materials on (60)Co dose is linear in the range of 1-1000 Gy. The TL yields of both of the co-doped glasses and TLD-100 are greater for electron irradiation than for photon irradiation. The TL sensitivity of LKB:Ti,Mg is 1.3 times higher than the sensitivity of LKB:Cu,Mg and 12 times less than the sensitivity of TLD-100. The new TL dosimetric materials have low effective atomic numbers, good linearity of the dose responses, excellent signal reproducibility, and a simple glow curve structure. This combination of properties makes them suitable for radiation dosimetry.
authors: Department of Physics, Universiti Teknologi Malaysia, 81310 Skudai, Johor, Malaysia. yasser_ajr@hotmail.com
authors: Y S M
authors: YS
authors: Alajerami
authors: S
authors: S
authors: Hashim
authors: A T
authors: AT
authors: Ramli
authors: M A
authors: MA
authors: Saleh
authors: M I
authors: MI
authors: Saripan
authors: K
authors: K
authors: Alzimami
authors: Ngie
authors: N
authors: Min Ung
mesh_terms: D004307:Dose-Response Relationship, Radiation; D004583:Electrons; D004867:Equipment Design; D019544:Equipment Failure Analysis; D018020:Lithium Compounds / Q000737:chemistry* / Q000528:radiation effects*; D008422:Materials Testing; D008670:Metals / Q000737:chemistry* / Q000528:radiation effects*; D017785:Photons; D011829:Radiation Dosage; D013819:Thermoluminescent Dosimetry / Q000295:instrumentation* / Q000379:methods*
chemical_list: D018020:Lithium Compounds; D008670:Metals