Thermoluminescence glow curve analysis and kinetic parameters of Dy-doped BaSi_(2)O_(5)phosphor  

作　　者：Y.Alajlani N.Can 

机构地区：[1]Physics Department,Jazan University,P.O.Box 114,Jazan,45142,Saudi Arabia [2]Department of Physics,Faculty of Arts and Sciences,Manisa Celal Bayar University,Muradiye-Manisa,45010,Turkey

出　　处：《Journal of Rare Earths》2022年第2期234-242,I0002,共10页稀土学报（英文版）

基　　金：Project supported by the Deanship of Scientific Research at Jazan University,the Kingdom of Saudi Arabia(W41-032).

摘　　要：In this paper,Dy^(3+)incorporated BaSi_(2)O_(5)phosphors were synthesized by gel co mbustion method and characterized by X-ray diffraction(XRD).The effects of various heating rate s on thermoluminescence(TL)kinetics and glow peak temperatures of Dy^(3+)incorporated BaSi_(2)O_(5)phosphors exposed toβirradiation at room temperature were investigated.The glow curves of the phosphor exposed toβ-irradiation(0.1-100 Gy)consist of four main peaks located at 87,130,271,and 327℃and exhibit a good linearity between 0.1 and100 Gy.Three experimental techniques including variable heating rate(VHR),repeated initial rise(RIR),peak shape(PS)and computerized glow curve deconvolution(CGCD)were employed to determine TL kinetic parameters.Our findings indicate that the TL glow peaks of the phosphor obey first-order kinetics.Analysis of the main dosimetric peaks through the techniques mentio ned above indicates that activation energies(E)and pre-exponential factor(s)are in the range of 0.80-1.50 eV and 1.15×10^(8)-3.28×10^(13)s^(-1).Additionally,it is found that the temperature of the glow peaks shifts toward the higher temperatures and the TL intensity smoothly decreases as the heating rate increases.The effect on the TL intensities and glow peak temperatu res of the heating rate is discussed in terms of thermal quenching.

关 键 词：BaSi_(2)O_(5) Dy^(3+) Gel combustion XRD THERMOLUMINESCENCE Kinetic parameters 

分 类 号：TQ422[化学工程]