Heating rate effects on the thermoluminescence of fluorite

Ogundare, F.O.; Balogun, F.A.; Hussain, L. A.

doi:10.1016/j.radmeas.2005.01.004

Cited by 37 publications

(19 citation statements)

References 16 publications

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“…, peak 1 (P1), peak 2 (P2) and peak 3 (P3) are shifted towards higher temperatures with increasing heating rate and also their TL signals and peak areas are continuously decreasing. This phenomenon has been explained to be due to thermal quenching, whose efficiency increases as temperature increases . The maximum TL peak signals of the glow curve were normalized to lower heating rate (2 °C/sec) and the maximum TL signal decrease in the peak can be seen in Fig.…”

Section: Resultsmentioning

confidence: 99%

Thermoluminescence properties of annealed natural quartz after beta irradiation

et al. 2016

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Here we investigated the effects of annealing, heating rate and fading (after annealing at 800 °C) on the thermoluminescence (TL) glow curves of natural quartz (NQ). All of the samples were annealed at different temperatures between 100 °C and 800 °C and then irradiated with a beta dose of about 34 Gray (Gy), in order to determine the effects of annealing treatments on TL peaks of natural quartz. TL glow curves of the samples were recorded. It was observed that the intensities of TL peaks were strongly sensitive to annealing temperatures at 800 °C. The heating rate and fading effect of TL peaks of natural quartz were examined for the annealed samples at 800 °C for 30 min. It was observed that the intensities of the TL peaks were differently affected from heating rate and fading. Additionally, TL kinetic parameters (activation energy, frequency factor and order of kinetics) of all peaks were determined for annealed samples using a computerized glow curve deconvolution (CGCD) method and Mathematica software. Copyright © 2016 John Wiley & Sons, Ltd.

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Section: Resultsmentioning

confidence: 99%

Thermoluminescence properties of annealed natural quartz after beta irradiation

et al. 2016

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“…As seen in this figure, the peak temperatures of all the glow peaks in the glow curves of natural CaF 2 are shifting toward the higher temperature side as the heating rate increases and also their intensities are continuously decreasing. Ogundare et al (9) have studied the effect of varying heating rates on the integrated TL intensity, peak height and temperature of the two high-temperature glow peaks in Nigerian fluorite. Their study showed that the integrated TL intensity of Nigerian fluorite decreases with increasing heating rate.…”

Section: Resultsmentioning

confidence: 99%

“…CaF 2 has attracted a lot of attention and has been found attractive for radiation dosimetry in both natural and synthetic forms after doping with Dy, Mn or Tm (4)(5)(6)(7). For thermoluminescence (TL) application in dosimetry, average absorbed dose is usually estimated from a previously established dependence of the TL glow-peak-integrated TL intensity or the maximum intensity on radiation dose (8,9). However, it is well known that the integrated intensity and the maximum intensity of dosimetric peaks of some TL materials (i.e.…”

Section: Introductionmentioning

confidence: 99%

“…TLD-100) changes with variations in pre-irradiation heat treatments and heating rates (10). Therefore, in the development of new TL materials for dosimetry purposes, efforts have been made to understand the effects of heat treatments on the glow peaks of the materials (9)(10)(11)(12)(13)(14)(15)(16)(17). For example, Kharita et al (17) used annealing temperatures between 150 • C and 750 • C for a duration of 1 h and observed the effect of the annealing temperature on the intensity of TL peaks of powder natural fluorite samples from Cornwall, England.…”

Section: Introductionmentioning

confidence: 99%

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The effects of pre-irradiation heat treatment and heating rate on the thermoluminescence glow peaks of natural CaF₂

Yüksel

Topaksu

Yazici

et al. 2010

Radiation Effects and Defects in Solids

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In this article, we have investigated the effects of pre-irradiation heat treatments on the thermoluminescence (TL) glow peaks of natural fluorite (CaF 2 ) collected from the central Anatolia region of Turkey. A typical TL glow curve of phosphor consists of four clear glow peaks with maximum intensities occurring at temperatures around 100 • C, 120 • C, 190 • C and 290 • C for a sample irradiated to a dose of 48 Gy and readout at a heating rate of 1 • C/s. It was observed that the intensities of all the TL glow peaks are strongly sensitive to annealing temperatures and durations. Annealing at 450 • C for 15 min was found to be the best for reproducibility of experimental results. The dose-responses of individual TL peaks of this material were also examined after annealing at 450 • C for 15 min by β-irradiation to doses between 0.04 Gy and ≈10.4 kGy. It was observed that the total area and peak heights of all glow peaks showed similar trends with increasing radiation dose; first, they increased linearly up to ≈50 Gy and then saturation effects began above this dose value. The effect of heating rate on the TL glow peaks of the mineral was also studied and it was observed that the intensities of glow peaks are differently affected with variation in heating rate.

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“…However, the TL response strongly depends on heating rate, an important parameter in the TL measurements. Influence of the heating rate on TL glow curve has been the object of study by different authors [1][2][3][4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Effect of Heating Rate on the Responses of LiF: Mg, Cu, Na, Si Thermoluminescent Phosphor

Ha¹,

Hai²,

Long³

2011

Comm. in Phys.

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Abstract. In the current work the glow curves for LiF:Mg,Cu,Na,Si thermoluminescent material were measured and analyzed by using a function approximating to the well-known Randall-Wilkins first-order expression. The influence of different heating rates on thermoluminescent glow-peak maximum temperature, peak height and integrated area of the glow peak was investigated for LiF:Mg,Cu,Na,Si phosphor. The results show that the glow-peak temperature, peak height and glow peak area increase with increasing heating rate, while the full width at half maximum of glow peak almost keeps constant in the range of heating rates studied.

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Heating rate effects on the thermoluminescence of fluorite

Cited by 37 publications

References 16 publications

Thermoluminescence properties of annealed natural quartz after beta irradiation

Thermoluminescence properties of annealed natural quartz after beta irradiation

The effects of pre-irradiation heat treatment and heating rate on the thermoluminescence glow peaks of natural CaF₂

Effect of Heating Rate on the Responses of LiF: Mg, Cu, Na, Si Thermoluminescent Phosphor

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Heating rate effects on the thermoluminescence of fluorite

Cited by 37 publications

References 16 publications

Thermoluminescence properties of annealed natural quartz after beta irradiation

Thermoluminescence properties of annealed natural quartz after beta irradiation

The effects of pre-irradiation heat treatment and heating rate on the thermoluminescence glow peaks of natural CaF2

Effect of Heating Rate on the Responses of LiF: Mg, Cu, Na, Si Thermoluminescent Phosphor

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The effects of pre-irradiation heat treatment and heating rate on the thermoluminescence glow peaks of natural CaF₂