Semi-localized transitions model for thermoluminescence

Mandowski, A.

doi:10.1088/0022-3727/38/1/004

Cited by 94 publications

(53 citation statements)

References 13 publications

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“…This discrepancy can also be a result of imperfect modelling of the isothermal process, e.g. the assumed density distribution of bandtail states and the role of thermally excitation to excited states (Mandowski, 2005) are not considered in this study. Future studies on the role of the excited state during thermal stimulation are necessary, but these rely on the knowledge of the thermal energy level of the excited state which is poorly understood.…”

Section: Discussionmentioning

confidence: 97%

The effect of band-tail states on the thermal stability of the infrared stimulated luminescence from K-feldspar

2013

Journal of Luminescence

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The thermal stability of the infrared stimulated luminescence (IRSL) signal from a sedimentary K-feldspar was investigated using isothermal decay study. It is observed that the isothermal decay of IRSL signal cannot be described using a first-order exponential decay function. Instead, the decay can be well described by considering the presence of band-tail states. Based on the isothermal decay results, a trap depth of ∼1.92 eV was obtained for the IRSL stimulated at 50 °C and the width of the band-tail states was found to be ∼0.37 eV below the conduction band edge. Deeper trap depths (up to ∼2.06 eV) were obtained for multi-elevatedtemperature post-IR IRSL (MET-pIRIR) at elevated temperatures. Based on these observations, the implication for the IRSL dating feldspar was discussed. AbstractThe thermal stability of the infrared stimulated luminescence (IRSL) signal from a sedimentary K-feldspar was investigated using isothermal decay study. It is observed that the isothermal decay of IRSL signal cannot be described using a first-order exponential decay function. Instead, the decay can be well described by considering the presence of band-tail states. Based on the isothermal decay results, a trap depth of ~1.92 eV was obtained for the IRSL stimulated at 50°C and the width of the band-tail states was found to be ~0.37 eV below the conduction band edge. Deeper trap depths (up to ~2.06 eV) were obtained for multielevated-temperature post-IR IRSL (MET-pIRIR) at elevated temperatures. Based on these observations, the implication for the IRSL dating feldspar was discussed.

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Section: Discussionmentioning

confidence: 97%

The effect of band-tail states on the thermal stability of the infrared stimulated luminescence from K-feldspar

2013

Journal of Luminescence

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“…There are also other higher-, general-, and mixed-order models to describe other variations in TL glow curves, as well as a push to replace the entire order-of-kinetics model [51][52][53][54] . Other models include a semi-localized transition model 55 which has been invoked to explain non-physical frequency factors, where the factor s from Equation (1) has values far beyond any possible phonon interaction frequency, and anomalous heating rate effects, where the number of photons emitted increases with heating rate. There are also add-on effects such as the previously mentioned thermal quenching effect in some materials such as Al 2 O 3 :C (Ref.…”

Section: Alternative Trap Modelsmentioning

confidence: 99%

Thermoluminescent microparticle thermal history sensors

et al. 2016

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While there are innumerable devices that measure temperature, the nonvolatile measurement of thermal history is far more difficult, particularly for sensors embedded in extreme environments such as fires and explosions. In this review, an extensive analysis is given of one such technology: thermoluminescent microparticles. These are transparent dielectrics with a large distribution of trap states that can store charge carriers over very long periods of time. In their simplest form, the population of these traps is dictated by an Arrhenius expression, which is highly dependent on temperature. A particle with filled traps that is exposed to high temperatures over a short period of time will preferentially lose carriers in shallow traps. This depopulation leaves a signature on the particle luminescence, which can be used to determine the temperature and time of the thermal event. Particles are prepared-many months in advance of a test, if desired-by exposure to deep ultraviolet, X-ray, beta, or gamma radiation, which fills the traps with charge carriers. Luminescence can be extracted from one or more particles regardless of whether or not they are embedded in debris or other inert materials. Testing and analysis of the method is demonstrated using laboratory experiments with microheaters and high energy explosives in the field. It is shown that the thermoluminescent materials LiF:Mg,Ti, MgB 4 O 7 :Dy,Li, and CaSO 4 :Ce,Tb, among others, provide accurate measurements of temperature in the 200 to 500°C range in a variety of high-explosive environments.

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“…This in order to create a more realistic framework for the TL mechanism during heating which combines the effects of delocalized, semi-localized and localized (geminate) recombination in the TL mechanism of composite peak 5 and is capable of predicting the linear/supralinear behavior of the dose response of this material [29]. The demonstration of localized recombination in the TL mechanism of composite peak 5 in LiF:Mg,Ti has sparked renewed interest in the development of kinetic models incorporating localized and semi-localized transitions [30,31].…”

Section: F Center Participation In the Lif:mgti Trapping And Recombimentioning

confidence: 99%

Conduction band/valence band kinetic modeling of the LiF:Mg,Ti system incorporating creation of defects in the irradiation stage

Eliyahu

Horowitz

Oster

2012

Nuclear Instruments and Methods in Physics Research Section B:

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Semi-localized transitions model for thermoluminescence

Cited by 94 publications

References 13 publications

The effect of band-tail states on the thermal stability of the infrared stimulated luminescence from K-feldspar

The effect of band-tail states on the thermal stability of the infrared stimulated luminescence from K-feldspar

Thermoluminescent microparticle thermal history sensors

Conduction band/valence band kinetic modeling of the LiF:Mg,Ti system incorporating creation of defects in the irradiation stage

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