Modeling of the shape of infrared stimulated luminescence signals in feldspars

Publication: Research - peer-reviewConference article – Annual report year: 2012

  • Author: Pagonis, Vasilis

    Physics Department, McDaniel College, United States

  • Author: Jain, Mayank

    Radiation Physics, Center for Nuclear Technologies, Technical University of Denmark, Frederiksborgvej 399, 4000, Roskilde, Denmark

  • Author: Murray, Andrew S.

    Aarhus University, Denmark

  • Author: Ankjærgaard, Christina

    Delft University of Technology, Netherlands

  • Author: Chen, Reuven

    Raymond and Beverly Sackler School of Physics and Astronomy, Tel Aviv University, Israel

View graph of relations

This paper presents a new empirical model describing infrared (IR) stimulation phenomena in feldspars. In the model electrons from the ground state of an electron trap are raised by infrared optical stimulation to the excited state, and subsequently recombine with a nearest-neighbor hole via a tunneling process, leading to the emission of light. The model explains the experimentally observed existence of two distinct time intervals in the luminescence intensity; a rapid initial decay of the signal followed by a much slower gradual decay of the signal with time.The initial fast decay region corresponds to a fast rate of recombination processes taking place along the infrared stimulated luminescence (IRSL) curves. The subsequent decay of the simulated IRSL signal is characterized by a much slower recombination rate, which can be described by a power-law type of equation.Several simulations of IRSL experiments are carried out by varying the parameters in the model. It is found that the shape of the IRSL signal is remarkably stable when the kinetic parameters are changed within the model; this is in agreement with several previous studies of these signals on feldspars, which showed that the shape of the IRSL curves does not change significantly under different experimental conditions. The relationship between the simulated IRSL signal and the well-known power-law dependence of relaxation processes in solids is also explored, by fitting the IRSL signal at long times with a power-law type of equation. The exponent in this power-law is found to depend very weakly on the various parameters in the model, in agreement with the results of experimental studies. The results from the model are compared with experimental IRSL curves obtained using different IR stimulating power, and good quantitative agreement is found between the simulation results and experimental data.
Original languageEnglish
JournalRadiation Measurements
Publication date2012
Volume47
Issue9
Pages870-876
ISSN1350-4487
DOIs
StatePublished

Conference

Conference13th International Conference on Luminescence and Electron Spin Resonance Dating - LED 2011
CountryPoland
CityTorun
Period10/07/1114/07/11
CitationsWeb of Science® Times Cited: 7

Keywords

  • Infrared stimulated luminescence, IRSL, Feldspars, Power law of luminescence, Kinetic rate equations, Kinetic model, Tunneling
Download as:
Download as PDF
Select render style:
APAAuthorCBEHarvardMLAStandardVancouverShortLong
PDF
Download as HTML
Select render style:
APAAuthorCBEHarvardMLAStandardVancouverShortLong
HTML
Download as Word
Select render style:
APAAuthorCBEHarvardMLAStandardVancouverShortLong
Word

ID: 12345887