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Correlated ESR, PL and TL studies on Sr-5(PO4)(3)Cl : Eu thermoluminescence dosimetry phosphor

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Title Correlated ESR, PL and TL studies on Sr-5(PO4)(3)Cl : Eu thermoluminescence dosimetry phosphor
 
Creator DHOBLE, SJ
MOHARIL, SV
GUNDU RAO, TK
 
Subject luminescence
centers
eu
thermoluminescence
radiation dosimetry
electron spin resonance
phosphor
photoluminescence
 
Description Electron spin resonance (ESR), thermoluminescence and photoluminescence studies in Eu2+ activated Sr-5(PO4)(3)Cl phosphor are reported in this paper. The Sr-5(PO4)(3)Cl:Eu2+ phosphor is twice as sensitive as the conventional CaSO4:Dy phosphor used in thermoluminescence dosimetry of ionizing radiations. It has a linear response, simple glow curve, emission peaking at 456 nm. The defect centers formed in the Sr-5(PO4)(3)Cl:Eu2+ phosphor are studied by using the technique of ESR. A dominant TL glow peak at 430 K with a smaller shoulder at 410K is observed in the phosphor. ESR studies indicate the presence at three centers at room temperature. Step annealing measurements show a connection between one of the centers and the dominant glow peak at 430 K. The 430 K TL peak is well correlated with center I, which is tentatively identified as (PO4)(2-) radical. (c) 2006
 
Publisher ELSEVIER SCIENCE BV
 
Date 2011-07-24T15:09:00Z
2011-12-26T12:58:56Z
2011-12-27T05:49:39Z
2011-07-24T15:09:00Z
2011-12-26T12:58:56Z
2011-12-27T05:49:39Z
2007
 
Type Article
 
Identifier JOURNAL OF LUMINESCENCE, 126(2), 383-386
0022-2313
http://dx.doi.org/10.1016/j.jlumin.2006.08.098
http://dspace.library.iitb.ac.in/xmlui/handle/10054/6459
http://hdl.handle.net/10054/6459
 
Language en