SAIP2015

Thermoluminescence (TL) study of β-stimulated BaAl₂O₄:Eu²⁺,Dy³⁺ phosphor

Not scheduled

1h 50m

Board: F.089

Poster Presentation Track F - Applied Physics

Speaker

Mr ALI HALAKE WAKO (University of the Freestate)

Main supervisor (name and email)<br>and his / her institution

Dejene B. F
dejenebf@qwa.ufs.ac.za
University of the Free State

Please indicate whether<br>this abstract may be<br>published online<br>(Yes / No)

Yes

Apply to be<br> considered for a student <br> &nbsp; award (Yes / No)?

Yes

Would you like to <br> submit a short paper <br> for the Conference <br> Proceedings (Yes / No)?

Yes

Level for award<br>&nbsp;(Hons, MSc, <br> &nbsp; PhD, N/A)?

PhD

Abstract content <br> &nbsp; (Max 300 words)<br><a href="http://events.saip.org.za/getFile.py/access?resId=0&materialId=0&confId=34" target="_blank">Formatting &<br>Special chars</a>

Thermoluminescence (TL) properties of beta irradiated Eu²⁺ doped and Dy³⁺ co-doped barium aluminate BaAl₂O₄:Eu²⁺,Dy³⁺ have been studied. The BaAl₂O₄:Eu²⁺,Dy³⁺ phosphors were prepared using solution - combustion synthesis method at initiating temperature of 500^oC technique using urea (CH₄N₂O) as a reducing agent and Ba(NO₃)₂, Al(NO₃)₃.9H₂O, Eu(NO₃)₃.5H₂O and Dy(NO₃)₃ as raw materials. The electron-trapping properties in terms of TL glow curves are reported. The TL intensity was recorded for different beta (β) doses at different heating rates and was observed to increase with increasing β dose. The influence of repeated measurements on the same sample on peak temperature and TL intensity was also investigated so as to ascertain its repeatability and stability. Different kinetic parameters like activation energy (E), frequency factor (S) and geometrical factor were calculated by different methods including initial rise, variable heating rate and peak shape methods.