Theoretical Models of Thermoluminescence and Their Relevance in Experimental Work

Sunta, C.M.; Ayta, Walter Elias Feria; Kulkarni, R. N.; Piters, T.M.; Watanabe, Sho

doi:10.1093/oxfordjournals.rpd.a032730

Cited by 9 publications

(31 citation statements)

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“…Methods based on the use of Eq. (1) have been successfully applied to analyse glow-peaks [5]. Moreover, Rasheedy [6][7][8] has verified that the method successfully describes glow-curves that consist of one or more glow-peaks.…”

Section: Rasheedy's Activation Energy Expressionmentioning

confidence: 86%

“…Moreover, Rasheedy [6][7][8] has verified that the method successfully describes glow-curves that consist of one or more glow-peaks. Sunta et al [5] showed that methods based on Eq. (1) are reliable except in cases where the retrapping probability is much greater than the recombination probability and the trap is filled up near to saturation.…”

Section: Rasheedy's Activation Energy Expressionmentioning

confidence: 99%

“…In particular, Braunlich [4] showed that in cases where the retrapping probability is much higher than the recombination probability and the traps are filled up close to saturation, the initial-rise method for determining the activation energy is unreliable. Sunta et al [5] using simulated glow-curves also found that when retrapping was dominant, glow-curves could not be properly described using either general-order fitting or peak-shape methods.…”

Section: Introductionmentioning

confidence: 99%

“…Under certain conditions, such as when the retrapping probability is greater than the recombination probability, the shape of the glow-peak may be distorted [5]. Analysing such a distorted glow-peak for kinetic parameters using methods that require the use of the whole or a portion of the glow-peak will inevitably produce erroneous kinetic parameters.…”

Section: Introductionmentioning

confidence: 99%

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Accuracy of the activation energy calculated from a thermoluminescence glow‐peak using a method that uses three points on the peak

Ogundare¹,

Chithambo²

2006

Phys. Status Solidi (c)

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PACS 78.60.Kn This paper shows that the limitations of the general-order and peak-shape methods of kinetic analysis in cases where the retrapping probability greatly exceeds the recombination probability may be avoided if the analysis method proposed by Rasheedy [6-8] is applied. Analysis of computer simulated glow-curves using the general-order, peak-shape, and Rasheedy's protocol showed that Rasheedy's method gave the best agreement between calculated and default values. The accuracy of the method improved for data selected well below 10% of the peak maximum in the initial-rise region of a glow-peak. The observed improvement has been attributed to the fact that in the initial-rise region, the quasiequilibrium condition is better satisfied than at the higher temperature end of the glow-peak. In general, we find that when the retrapping probability increases, the analysis for kinetic parameters is better carried out on data selected well below 10% of maximum peak intensity.

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Section: Rasheedy's Activation Energy Expressionmentioning

confidence: 86%

Section: Rasheedy's Activation Energy Expressionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Accuracy of the activation energy calculated from a thermoluminescence glow‐peak using a method that uses three points on the peak

Ogundare¹,

Chithambo²

2006

Phys. Status Solidi (c)

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“…The limitation of the peak shape method is not because of the improper application of the methods, but is for reasons inherent in the shape of the peak itself. High values of d, t and o together with low value of 'T m ' lead to a lower value of 'E' [44].…”

mentioning

confidence: 99%

Effect of NaF flux on microstructure and thermoluminescence properties of Sm3+ doped CdSiO3 nanophosphor

Manjunatha

Nagabhushana

Sunitha

et al. 2013

Journal of Luminescence

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a b s t r a c tThis work reports the preparation of CdSiO 3 :Sm 3 þ (1-7 mol%) nanophosphors by a low temperature solution combustion method. For the first time the effect of NaF flux on the crystallization behavior, morphology, and thermoluminescence property of 5 mol% Sm 3 þ doped CdSiO 3 has been investigated. The nanopowders are well characterized by powder X-ray diffraction (PXRD), Fourier Transform InfraRed (FT-IR), and scanning electron microscopy (SEM). PXRD results indicate that the powder calcined at 800 1C for 2 h has monoclinic phase. SEM results show that the powder is highly porous and the pore size and shape can be modified by the addition of NaF flux. Addition of NaF could lead to formation of particle type morphology and the increase in wt% of NaF changes crystallinity and phase. The thermoluminescence glow curves for 2-6 wt% NaF in CdSiO 3 :Sm 3 þ show a single, well resolved glow peak at 126, 130 and 150 1C, respectively. But for the sample prepared with 8 wt% of NaF flux shows two glow peaks at 148 and 220 1C. With the addition of NaF flux, TL intensity can be effectively enhanced.&

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Luminescence study of LiMgBO₃:Dy for γ‐ray and carbon ion beam exposure

Yerpude

Chopra²,

Dhoble³

et al. 2019

Luminescence

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LiMgBO 3 :Dy 3+ , a low Z eff material was prepared using the solution combustion method and its luminescence properties were studied using X-ray diffraction (XRD), scanning electron microscopy (SEM), thermoluminescence (TL), photoluminescence (PL), Fourier transform infrared spectroscopy, and electron paramagnetic resonance (EPR) techniques. Reitvield refinement was also performed for the structural studies.The PL emission spectra for LiMgBO 3 :Dy 3+ consisted of two peaks at 478 due to the 4 F 9/2 → 6 H 15/2 magnetic dipole transition and at 572 nm due to the hypersensitive 4 F 9/2 → 6 H 13/2 electric dipole transition of Dy 3+ , respectively. A TL study was carried out for both the γ-ray-irradiated sample and the C 5+ irradiated samples and was found to show high sensitivity for both. Moreover the γ-ray-irradiated LiMgBO 3 :Dy 3+ sample showed linearity in the dose range 10 Gy to 1 kGy and C 5+ -irradiated samples show linearity in the fluence range 2 × 10 10 to 1 × 10 11 ions/cm 2 . In the present study, the initial rise method, various heating rate method, the whole glow curve method, glow curve convolution deconvolution function, and Chen's peak shape method were used to calculate kinetic parameters to understand the TL glow curve mechanism in detail. Finally, an EPR study was performed to examine the radicals responsible for the TL process. KEYWORDS ESR, LiMgBO 3 , tissue equivalent material, trapping parameters | INTRODUCTIONBoron-based materials show interesting thermoluminescence (TL) properties when exposed to ionizing radiation [1,2] . The luminescence properties of lithium borate and magnesium borate in both microcrystalline and nanocrystalline forms have been studied previously [1][2][3][4] . Recently, researchers who studied lithium magnesium borate phosphor found that it was useful for applications in dosimetry [5,6] .To date, only a few studies on LiMgBO 3 have been reported [5] .Recently, the TL properties of rare earth ion (RE = Tb, Gd, Dy, Pr, Mn, Ce, Eu)-doped lithium magnesium borate (LMB), prepared using the solid state diffusion method, have been documented [6] . LMB:Tb 3+ showed the best results with a stable TL peak at 240°C. LMB:Tb 3+ was about four times more sensitive than TLD-100. Optical properties of LMB glasses doped with Dy 3+ ,Sm 3+ ions have been studied [7] .Photoluminescence properties of LMB:Eu and LMB:Eu,Bi have also been studied in detail [8] . LiMgBO 3 :Dy 3+ in its polycrystalline form has been prepared using a novel solution combustion method and its TL sensitivity was found to be half compared with commercial TLD-100 and showed a high degree of fading of 30% after 20 days [9] . Furthermore, LiMgBO 3 :Dy 3+ in its nanocrystalline form has been prepared using the combustion method and its structural and optical properties have been studied [10] .

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Theoretical Models of Thermoluminescence and Their Relevance in Experimental Work

Cited by 9 publications

References 0 publications

Accuracy of the activation energy calculated from a thermoluminescence glow‐peak using a method that uses three points on the peak

Accuracy of the activation energy calculated from a thermoluminescence glow‐peak using a method that uses three points on the peak

Effect of NaF flux on microstructure and thermoluminescence properties of Sm3+ doped CdSiO3 nanophosphor

Luminescence study of LiMgBO₃:Dy for γ‐ray and carbon ion beam exposure

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Theoretical Models of Thermoluminescence and Their Relevance in Experimental Work

Cited by 9 publications

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Accuracy of the activation energy calculated from a thermoluminescence glow‐peak using a method that uses three points on the peak

Accuracy of the activation energy calculated from a thermoluminescence glow‐peak using a method that uses three points on the peak

Effect of NaF flux on microstructure and thermoluminescence properties of Sm3+ doped CdSiO3 nanophosphor

Luminescence study of LiMgBO3:Dy for γ‐ray and carbon ion beam exposure

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Luminescence study of LiMgBO₃:Dy for γ‐ray and carbon ion beam exposure