Thermoluminescence glow-curve deconvolution functions for first, second and general orders of kinetics

Kitis, G.; Gómez-Ros, J.M.; Tuyn, J.W.N.

doi:10.1088/0022-3727/31/19/037

Cited by 855 publications

(291 citation statements)

References 4 publications

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“…Theoretically the value of geometrical form factor (µg) is close to 0.42 for first order kinetics, and value is 0.52 for second order kinetics. The estimated kinetic parameters for Zn2SiO4 Eu 2+ , Mn 2+ phosphor is calculated by curve fitting techniques CGCD curve of experimental data and the peak shape method proposed by Chen and others (Chen 1969;Chen and Kirsh, 1981, Kitis 1998, Puchalska and Bilski, 2006. The activation energy is found in between 0.69 to 0.78eV and the frequency factor is range of 1×10 13 to 3×10 13 for UV irradiated phosphor.…”

Section: Resultsmentioning

confidence: 99%

Photoluminescece and Thermoluminescence Behavior of Zn2SiO4: Mn2+, Eu2+ Phosphor

Dubey¹,

Tiwari²,

Pradhan³

et al. 2014

JLA

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The present paper reports the synthesis, photoluminescence and thermoluminescence (TL) studies of Mn 2+ and Eu 2+ doped Zn2SiO4. The sample was prepared by the modified solid state reaction method, which is the most suitable for large-scale production. The prepared phosphor sample was characterized using Powder XRay Diffraction (PXRD), Field Emission Scanning Electron Microscopy (FESEM), Fourier Transform Infrared Spectroscopy (FTIR), photoluminescence (PL) and Thermoluminescence (TL) techniques. The PL emission was observed in the range 400-650 nm ranges green regions for the Mn 2+ and Eu 2+ doped Zn2SiO4. Excitation spectrum found at 267, 278 and 314nm. Sharp intense peaks found around 490, 544 and 552nm with high intensity. From the XRD data, using the Scherer's formula, the calculated average crystallite size of phosphor is around few microns. Thermoluminescence study was carried out for the phosphor with UV irradiation with linear heating rate 6.7 0 C s -1 . The kinetic parameters are calculated by (Computerized glow curve convolution technique) CGCD technique.

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Section: Resultsmentioning

confidence: 99%

Photoluminescece and Thermoluminescence Behavior of Zn2SiO4: Mn2+, Eu2+ Phosphor

Dubey¹,

Tiwari²,

Pradhan³

et al. 2014

JLA

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“…The kinetic parameters were calculated according to the glow curve shape method (modified by Chen) [45,46] and results are tabulated in Table 2. The order of kinetics were estimated by the form factor 'm g ' also known as symmetry factor m g ¼ ðT 2 ÀT m Þ=ðT 2 ÀT 1 Þ ¼ ðd=oÞ, where T 1 and T 2 are the temperatures (from the deconvoluted curves) corresponding to the half of the maximum intensities on either side of the glow peak maximum-T m [47,48].…”

Section: Resultsmentioning

confidence: 99%

100MeV Si8+ ion induced luminescence and thermoluminescence of nanocrystalline Mg2SiO4:Eu3+

Prashantha¹,

Lakshminarasappa²,

Singh³

2012

Journal of Luminescence

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a b s t r a c tNanoparticles of Mg 2 SiO 4 :Eu 3 þ have been prepared by the solution combustion technique and the grain size estimated by PXRD is found to be in the range 40-50 nm. Ionoluminescence (IL) studies of Mg 2 SiO 4 :Eu 3 þ pellets bombarded with 100 MeV Si 8 þ ions with fluences in the range 1.124-22.48 Â 10 12 ions cm À 2 are carried out at IUAC, New Delhi, India. Five prominent IL bands with peaks at 580 nm, 590 nm, 612 nm, 655 nm and 705 nm are recorded. These characteristic emissions are attributed to the luminescence centers activated by Eu 3 þ cations. It is found that IL intensity decreases rapidly in the beginning. Later on, the intensity decreases slowly with further increase of ion fluence. The reduction in the ionoluminescence intensity with increase of ion fluence might be attributed to degradation of Si-O (n 3 ) and Si-O (2n 3 ) bonds present on the surface of the sample. The red emission with peak at 612 nm is due to characteristic emission of 5 D 0 -7 F 2 of the Eu 3 þ cations. Thermoluminescence (TL) studies of Mg 2 SiO 4 :Eu 3 þ pellets bombarded with 100 MeV Si 8 þ cations with fluences in the range 5 Â 10 11 ions cm À 2 to 5 Â 10 13 ions cm À 2 are made at RT. Two prominent and well resolved TL glows with peaks at $ 220 1C and $ 370 1C are observed. It is observed that TL intensity increases with increase of ion fluence. This might be due to creation of new traps during swift heavy ion irradiation.

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“…The thermoluminescence was analysed on the basis of general-order kinetics using the model of Kitis (1998). Since thermal quenching had been determined for the apparently-single main peak, the thermoluminescence intensity &( ) was fitted by the expression…”

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confidence: 99%

“…Components of the main peak recovered by digital mustering (Chithambo and Niyonzima 2014) were analysed using the Kitis general-order expression (Kitis, 1998). The aim of digital-mustering is to separate peaks and obtain their complete shape to enable kinetic analysis.…”

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confidence: 99%

Thermoluminescence of SrAl2O4:Eu2+, Dy3+: Kinetic analysis of a composite-peak

Chithambo

Wako

Finch

2017

Radiation Measurements

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The kinetic analysis of thermoluminescence of beta-irradiated SrAl 2 O 4 :Eu 2+ ,Dy 3+ is reported.The glow-curve is dominated by an apparently-single peak. It has been demonstrated using a number of tests including partial dynamic-heating, isothermal heating, phosphorescence and, the effect of fading, that the peak and the glow-curve consists of a set of closely-spaced peaks. In view of the peak being complex, its first few components were abstracted and analysed and for comparison, the peak was also analysed assuming it is genuinely single. In the latter, the order of kinetics is calculated to be intermediate between first and second-order and not first-order as predicted by qualitative tests such as the − or − procedures. A model based on density of energy states has been used to account for and reconcile the qualitative and quantitative results. The activation energy is found as ~1 eV, consistent with the value expected of Dy 2+ , the presumed electron trapping state of the Dy 3+ electron trap. The thermoluminescence is subject to thermal quenching with an activation energy of 0.520 ± 0.002 eV. The luminescence is ascribed to 5d→4f 7 Eu 2+ transitions whereas the thermal quenching is presumed to occur from an alternative level of the degenerate 5d energy level of the Eu 2+ cation.

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Thermoluminescence glow-curve deconvolution functions for first, second and general orders of kinetics

Cited by 855 publications

References 4 publications

Photoluminescece and Thermoluminescence Behavior of Zn2SiO4: Mn2+, Eu2+ Phosphor

Photoluminescece and Thermoluminescence Behavior of Zn2SiO4: Mn2+, Eu2+ Phosphor

100MeV Si8+ ion induced luminescence and thermoluminescence of nanocrystalline Mg2SiO4:Eu3+

Thermoluminescence of SrAl2O4:Eu2+, Dy3+: Kinetic analysis of a composite-peak

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