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Thermal stability of infrared stimulated luminescence of sedimentary K-feldspar

Journal Article


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Abstract


  • The thermal stability of the infrared stimulated luminescence (IRSL) signal measured at 50 °C as a function of IR stimulation time was investigated using KF grains extracted from sediments from central China. A dependence of thermal stability of IRSL signal on IR stimulation time and stimulation temperature were observed in pulse annealing studies. Relatively lower thermal stability is given by the initial part of the IRSL measured at 50 °C, than the later part of IRSL curve. Based on these observations, the thermal stability of the post-IR IRSL signal stimulated at elevated temperatures (100–200 °C) was also investigated. It was found that at least two groups of traps (shallow and deep) are associated with the IRSL and post-IR IRSL signals. The IRSL signal obtained at 50 °C is mainly from the shallow traps while the post-IR IRSL obtained at elevated temperatures is mainly from the deep traps. The kinetics parameters obtained using pulse annealing test indicate that the shallow IRSL traps are probably associated with the ∼300–350 °C TL peak and the deep traps are probably associated with the ∼400 °C TL peak. The shallow traps (∼350 °C TL peak) are associated with those easy-to-fade traps and the deep traps (∼400 °C TL peak) are associated with hard-to-fade traps.

UOW Authors


  •   Li, Bo
  •   Li, Sheng-Hua (external author)

Publication Date


  • 2011

Citation


  • Li, B. & Li, S. (2011). Thermal stability of infrared stimulated luminescence of sedimentary K-feldspar. Radiation Measurements, 46 (1), 29-36.

Scopus Eid


  • 2-s2.0-78650808074

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1263&context=smhpapers

Ro Metadata Url


  • http://ro.uow.edu.au/smhpapers/264

Has Global Citation Frequency


Number Of Pages


  • 7

Start Page


  • 29

End Page


  • 36

Volume


  • 46

Issue


  • 1

Place Of Publication


  • United Kingdom

Abstract


  • The thermal stability of the infrared stimulated luminescence (IRSL) signal measured at 50 °C as a function of IR stimulation time was investigated using KF grains extracted from sediments from central China. A dependence of thermal stability of IRSL signal on IR stimulation time and stimulation temperature were observed in pulse annealing studies. Relatively lower thermal stability is given by the initial part of the IRSL measured at 50 °C, than the later part of IRSL curve. Based on these observations, the thermal stability of the post-IR IRSL signal stimulated at elevated temperatures (100–200 °C) was also investigated. It was found that at least two groups of traps (shallow and deep) are associated with the IRSL and post-IR IRSL signals. The IRSL signal obtained at 50 °C is mainly from the shallow traps while the post-IR IRSL obtained at elevated temperatures is mainly from the deep traps. The kinetics parameters obtained using pulse annealing test indicate that the shallow IRSL traps are probably associated with the ∼300–350 °C TL peak and the deep traps are probably associated with the ∼400 °C TL peak. The shallow traps (∼350 °C TL peak) are associated with those easy-to-fade traps and the deep traps (∼400 °C TL peak) are associated with hard-to-fade traps.

UOW Authors


  •   Li, Bo
  •   Li, Sheng-Hua (external author)

Publication Date


  • 2011

Citation


  • Li, B. & Li, S. (2011). Thermal stability of infrared stimulated luminescence of sedimentary K-feldspar. Radiation Measurements, 46 (1), 29-36.

Scopus Eid


  • 2-s2.0-78650808074

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1263&context=smhpapers

Ro Metadata Url


  • http://ro.uow.edu.au/smhpapers/264

Has Global Citation Frequency


Number Of Pages


  • 7

Start Page


  • 29

End Page


  • 36

Volume


  • 46

Issue


  • 1

Place Of Publication


  • United Kingdom