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Indian Journal of Pure & Applied Physics (IJPAP) >
IJPAP Vol.50 [2012] >
IJPAP Vol.50(08) [August 2012] >
| Title: | Thermoluminescence characteristics of natural kyanite — A study on non pre-heated and pre-heated sample |
| Authors: | Wary, G
Kalita, J M |
| Keywords: | Thermoluminescence
Glow curves
Electron traps
Activation energy
Order of kinetics
Kyanite |
| Issue Date: | Aug-2012 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | Thermally stimulated luminescence (TSL) of X-ray irradiated natural kyanite
in the form of micro-grain powder at room temperature has been studied under
non pre-heated and pre-heated conditions. The order of kinetics, activation
energy and pre-exponential frequency factor has been investigated. TSL peaks
are shown at temperatures 116.42, 125.46, 131.75 and 135.79oC for
non pre-heat kyanite and at 134.79, 144.50, 150.60 and 154.85oC for
pre-heated kyanite at their respective heating rates 2, 4, 6 and 8°C/s. XRD report shows excellent data and confirmed to be purely crystalline
in nature. Compositional and elemental analysis of kyanite powder have been
done by XRFS and EDXS and found to be a purity of grade III specification. From
the shape of the TL glow curve, it is found to be first order kinetics in both
cases. The activation energy and pre-exponential frequency factor have been
calculated as (0.93±0.03) eV and (9.51±0.19)×1010 s-1 for
non pre-heated kyanite, respectively and for pre-heated kyanite, these values
are (0.96±0.05) eV and (1.22±0.59)×1011 s-1,
respectively. |
| Page(s): | 566-570 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-1041 (Online); 0019-5596 (Print) |
| Source: | IJPAP Vol.50(08) [August 2012]
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