from 28 June 2015 to 3 July 2015 (Africa/Johannesburg)
SAIP2015 Proceeding published on 17 July 2016
Phosphorescence of phototransferred thermoluminescence in annealed synthetic quartz
Presented by Mrs. Elizabeth Fende Midiki nee Atang KOMBE on 30 Jun 2015 from 14:40 to 15:00
Type: Oral Presentation
Track: Track A - Division for Physics of Condensed Matter and Materials
Phosphorescence measurements carried out on the phototransferred peak of single crystalline synthetic quartz samples annealed at 500oC for 10 minutes is reported. The samples were exposed to beta irradiation and illuminated by 470nm blue LED light. The glow curves, recorded with a linear heating rate of 1oC/s, show a phototransferred main peak. Kinetic parameters such as activation energy (E), frequency factor (s) and order of kinetics (b) are found using analysis of the phosphorescence signal observed. This observation indicates that the behaviour of this phototransferred peak is consistent with first-order kinetics and has activation energy of about 0.65eV with a frequency factor in the order of 10^7 Hz. The dependence of the PTTL intensity of this main peak on illumination time (time the sample is exposed to 470nm blue light) gives rise to a peak.
Prof CHITHAMBO Makaiko