KINETIC CHARACTERIZATION OF GAG:CE PHOSPHOR

Year 2017, Volume: 3 Issue: 2, 95 - 106, 30.12.2017

Arzu Ege , Sibel Uysal Satılmış Levent Türkler Zekai Tek , Elisabeth Popovıcı

Abstract

Thermoluminescence (TL) kinetic characterization of cerium (Ce³⁺)
doped gadolinium aluminum garnet (GAG) prepared by
wet chemical synthesis method are
presented in this study. Thermoluminescence
glow curve of GAG phosphor after UV irradiated has two peaks at about 350 and 501
K with a heating rate of 2 Ks^-1. Thermoluminescence kinetic parameters such as
order of kinetics, frequency factor and activation energy associated with the main
glow peak of the GAG:Ce phosphor have been calculated using various heating
rates (VHR) computerized glow curve deconvulation (CGCD) and  peak shape (PS) methods in this study. The
activation energies obtained by VHR, PS and CGCD methods are calculated to be
1.24, 1.11 and 1.14 eV, respectively. The frequency factors attained by these methods
were found as 3.41x10¹¹, 1.80x10¹⁰ and 2.63x10¹⁰
s^-1, respectively. Results acquired using all methods are discussed and
compared.

Keywords

Gadolinium aluminum garnet, Thermoluminescence, Kinetic Parameter

KINETIC CHARACTERIZATION OF GAGCE PHOSPHOR

Abstract

Bu
çalışmada, ıslak kimyasal sentez metodu ile hazırlanmış seryum (Ce⁺³)
katkılı gadolinyum alüminyum garnetin termolüminesans (TL) kinetik
karakterizasyonu sunulmuştur. UV ile ışınlanmasının ardından GAG fosforunun, termolüminesans
ışıma eğrisi 2 Ks^-1
ısıtma hızı ile yaklaşık olarak 350 ve 501 K de iki pike sahiptir. Çalışmada
GAG:Ce fosforunun ana ışıma piki (501 K) ile ilişkili kinetik derece, frekans
faktörü ve aktivasyon enerjisi gibi termolüminesans kinetik parametreleri,
çeşitli ısıtma hızları (VHR), bilgisayarlı ışıma eğrisi dekonvulasyonu (CGCD)
ve pik şekli (PS) metotları ile hesaplanmıştır. VHR, PS ve CGCD metotları ile elde edilen aktivasyon enerjileri sırasıyla 1,24,
1,11 ve 1, 14 eV olarak hesaplanmıştır. Bu metotlarla ulaşılan frekans
faktörleri 3,41x10¹¹, 1,80x10¹⁰ ve 2,63x10¹⁰ s^-1
olarak bulunmuştur. Tüm metotlardan elde edilen sonuçlar kıyaslanmış ve
tartışılmıştır.

Keywords

Gadolinyum alüminyum garnet, Termolüminesans, Kinetik parametre

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