Limitation of peak fitting and peak shape methods for determination of activation energy of thermoluminescence glow peaks

• Published in: Radiation measurements Vol. 30; no. 2; pp. 197 - 201
• Main Authors: Sunta, C.M., Feria, Ayta W.E., Piters, T.M., Watanabe, S.
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.04.1999; Elsevier
• Subjects: Activation energy; Earth sciences; Earth, ocean, space; Exact sciences and technology; General order fitting; Geochronology; High retrapping; Isotope geochemistry. Geochronology; Peak shape; Thermoluminescence; Peak shape; General order fitting; Activation energy; High retrapping; Thermoluminescence; saturation; luminescence; probability; activation energy; thermoluminescence; kinetics; irradiation
• ISSN: 1350-4487; 1879-0925
• DOI: 10.1016/S1350-4487(99)00033-5

This paper shows the limitation of general order peak fitting and peak shape methods for determining the activation energy of the thermoluminescence glow peaks in the cases in which retrapping probability is much higher than the recombination probability and the traps are filled up to near saturation level. Right values can be obtained when the trap occupancy is reduced by using small doses or by post-irradiation partial bleaching. This limitation in the application of these methods has not been indicated earlier. In view of the unknown nature of kinetics in the experimental samples, it is recommended that these methods of activation energy determination should be applied only at doses well below the saturation dose.