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Indian Journal of Pure & Applied Physics (IJPAP) >
IJPAP Vol.42 [2004] >
IJPAP Vol.42(05) [May 2004] >
| Title: | ESR and thermoluminescence studies of bismuth doped calcium sulphide phosphors |
| Authors: | Tiwari, Manoj
Singh, Vijay
Rao, T K Gundu
Dhoble, S J |
| Keywords: | Electron spin resonance
Thermoluminescence
CaS phosphor
Defect centre |
| Issue Date: | May-2004 |
| Publisher: | CSIR |
| IPC Code: | F 21 K 2/04 |
| Abstract: | Thermally stimulated luminescence (TSL) and electron spin
resonance (ESR)studies were carried out on bismuth doped CaS phosphor
synthesized by using solid-state reaction technique. The defect centers formed
in CaS:Bi were studied using the
technique of electron spin resonance. The thermoluminescence glow curve shows
two peaks at about 400 and 505K. Irradiated CaS:Bi exhibits ESR lines due to defect centers. Thermal
annealing behaviour of the phosphor indicates that one of the defect centres
correlates with the TSL peaks at 400 and 505K. The center is characterized by
an isotropic g-value of 2.0034 and is assigned to a F+
center. |
| Page(s): | 323-325 |
| ISSN: | 0975-1041 (Online); 0019-5596 (Print) |
| Source: | IJPAP Vol.42(05) [May 2004]
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