9-13 July 2012
Africa/Johannesburg timezone
<a href="http://events.saip.org.za/internalPage.py?pageId=11&confId=14"><font color=#ff0000>SAIP2012 PROCEEDINGS AVAILABLE</font></a>

Thermoluminescent properties of CaAL<sub>2</sub>O<sub>4</sub>:Eu<sup>3+</sup>, (Dy<sup>3+</sup>,Sm<sup>3+</sup>) phosphors prepared by solid state reaction

12 Jul 2012, 17:30
2h
IT Building

IT Building

Poster Presentation Track A - Division for Condensed Matter Physics and Materials Poster Session

Speaker

Mr Manaka Mmakgabo Colen (Depertment of physics, University of South Africa)

Abstract content <br> &nbsp; (Max 300 words)

Long persistent phosphors were prepared by solid state reaction method. The samples were annealed for three hours at 1000-1200 degree celcius in a reducing atmosphere of N2/H2. The crystallinity of the phosphors was investigated by using X- ray diffraction (XRD) and the morphology was determined by a scanning electron microscope (SEM). The thermoluminescent and phosphorescent properties of the phosphors were investigated using an integral PC based thermoluminescence system reader (TL 1009I) supplied by Nucleonix. The samples were irradiated by a 254 nm UV lamp for 5 min and the decay curves were recorded at room temperature. The glow curves of the samples were recorded at a linear heating rate of 2 degree celcius per second. Photoluminescence (PL) properties were investigated by using a He-Cd laser and the broad band emission spectra observed can be attributed to the 4f65d1 t4o 4f7 transition of Eu2+ ions.

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

yes

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

MSc

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

Name: Dr.B.M Mothudi
E-mail:mothubm@unisa.ac.za
institution: UNISA

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

No

Primary author

Mr Manaka Mmakgabo Colen (Depertment of physics, University of South Africa)

Co-authors

Dr Dhlamini M.S (Depertment of Physics, University of South Africa) Dr Mothudi B.M (Physics Department,Unisa) Prof. Ntwaeaborwa O.M. (Depertment of Physics, University of South Africa) Prof. Swart H.C. (Physics Department,UFS)

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