New numerical model for thermal quenching mechanism in quartz based on two-stage thermal stimulation of thermoluminescence model

Kettab, Ahmed; Kadri, Dahane

doi:10.1016/j.arabjc.2013.05.027

Cited by 18 publications

(5 citation statements)

References 20 publications

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“…[15−17] In general, the peak intensity decreases with the increasing heating rate due to thermal quenching. [18] Therefore, the effects of heating rate on the glow curves of the thermoluminescent dosimeters TLD-600 and TLD-700 are also investigated using 252 Cf mixed neu-tron+gamma and 90 Sr-90 Y beta sources in this study. Some of the recorded glow curves after various heating rates are shown in Figs.…”

mentioning

confidence: 99%

Thermoluminescence Kinetic Parameters of TLD-600 and TLD-700 after ²⁵² Cf Neutron+Gamma and ⁹⁰ Sr- ⁹⁰ Y Beta Radiations

Iflazoglu¹,

Kafadar²,

Yazıcı³

et al. 2017

Chinese Phys. Lett.

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The thermoluminescent (TL) properties such as glow curve structure, relative thermoluminescence sensitivity, dose response linearity of lithium fluoride thermoluminescent dosimeters 6LiF:Ti,Mg (TLD-600) and 7LiF:Ti,Mg (TLD-700) are investigated after irradiation 252Cf neutron+gamma and 90Sr-90Y beta sources at room temperature and then the obtained results are compared. The kinetic parameters, namely the order of kinetics b, activation energy and the frequency factor s, are calculated using the computerized glow curve deconvolution (CGCD) program. The effect of heating rate on the glow curves of dosimeters is also investigated. The maximum TL peak intensities and the total area under the glow curves decrease with the increasing heating rate. There is no agreement with the kinetic parameters calculated by the CGCD program for both radiation sources.

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mentioning

confidence: 99%

Thermoluminescence Kinetic Parameters of TLD-600 and TLD-700 after ²⁵² Cf Neutron+Gamma and ⁹⁰ Sr- ⁹⁰ Y Beta Radiations

Iflazoglu¹,

Kafadar²,

Yazıcı³

et al. 2017

Chinese Phys. Lett.

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“…Formation of the cluster and thermal quenching effect are responsible for the increase and decrease in TL intensity with HR, respectively. This phenomenon was explained by many research works [27][28][29]. By increasing the temperature, thermal quenching efficiency increases, and the glow peak shifts to the higher temperatures.…”

Section: Resultsmentioning

confidence: 86%

“…This effect is a dominant phenomenon during the increase in HR. At low HRs, the trap is emptied at a lower temperature, leading to a lower glow peak temperature [29].…”

Section: Resultsmentioning

confidence: 99%

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Synthesis and characterisation of LiB ₃ O ₅ nanophosphor as a TL dosimeter

Kaviani

Shahbazi‐Gahrouei

Saray

2020

IET nanobiotechnol.

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In this work, lithium triborate (LiB 3 O 5) nanophosphor was synthesised by precipitation assisted high-temperature solid-state method followed by heating at different sintering temperatures. Then, its crystal structure and morphology were fully characterised. LiB 3 O 5 was doped with different concentrations of different dopants. To determine the thermoluminescence (TL) properties and structural specifications of doped lithium triborate, the sample was irradiated by photons and then, its TL glow curve was obtained using a TL dosimeter-reader system. To study the effect of heating rate (HR) on TL characterisation of this nanophosphor, TL measurements were done at different HRs. The results showed that, sintering temperature can affect the morphology and structural properties of lithium triborate and consequently its TL intensity. The findings also showed that the LiB 3 O 5 :Al nanophosphor with the dopant concentration of 2 wt.% has the highest sensitivity and the best peak position among the studied activators. The results of the HR method showed that this method may be provided accurate calculations of the physical parameters of the TL process. These results may be helpful in the development of tissue equivalent TL nanocrystalline detectors usable in medical and personnel dosimetry.

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“…It is well known that the then heating rate is an important experimental parameter on the glow peak intensities and peak temperatures of many TL dosimetric materials. In general, the peak intensity decreases with the increasing heating rate due to thermal quenching [17][18][19][20][21][22].…”

Section: Tl Resultsmentioning

confidence: 99%

Investigation of neutron sensitivity of un-doped and Dy-doped CaB4O7 for thermoluminescence applications

Iflazoglu

Yılmaz

Kafadar

et al. 2018

J Therm Anal Calorim

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In this study, thermoluminescence characteristics of un-doped and Dy-doped calcium tetraborate (CaB 4 O 7 ) compounds are reported. The polycrystalline powder samples of un-doped and Dy-doped CaB 4 O 7 were prepared by a solid-state reaction at high-temperature method. The identification and characteristics of the obtained compounds were determined by X-ray diffraction, Fourier transform infrared analysis, differential thermal analysis, thermogravimetric analysis, and scanning electron microscopy. The glow curves were obtained using a thermoluminescent reader. Neutron sensitivity, dose-response, and heating rate of CaB 4 O 7 compounds were determined by using a bare 252 Cf mixed neutron ? gamma (n ? c) source, and dose response results are compared to those of Harshaw TLD-600 and TLD-700 neutron dosimeters ( 6 LiF:Mg,Ti and 7 LiF:Mg,Ti). The sensitivity of CaB 4 O 7 :Dy (0.5%) sample is approximately 4.35 and 3.36 times higher than that of TLD-600 and TLD-700, respectively.

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New numerical model for thermal quenching mechanism in quartz based on two-stage thermal stimulation of thermoluminescence model

Cited by 18 publications

References 20 publications

Thermoluminescence Kinetic Parameters of TLD-600 and TLD-700 after ²⁵² Cf Neutron+Gamma and ⁹⁰ Sr- ⁹⁰ Y Beta Radiations

Thermoluminescence Kinetic Parameters of TLD-600 and TLD-700 after ²⁵² Cf Neutron+Gamma and ⁹⁰ Sr- ⁹⁰ Y Beta Radiations

Synthesis and characterisation of LiB ₃ O ₅ nanophosphor as a TL dosimeter

Investigation of neutron sensitivity of un-doped and Dy-doped CaB4O7 for thermoluminescence applications

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New numerical model for thermal quenching mechanism in quartz based on two-stage thermal stimulation of thermoluminescence model

Cited by 18 publications

References 20 publications

Thermoluminescence Kinetic Parameters of TLD-600 and TLD-700 after 252 Cf Neutron+Gamma and 90 Sr- 90 Y Beta Radiations

Thermoluminescence Kinetic Parameters of TLD-600 and TLD-700 after 252 Cf Neutron+Gamma and 90 Sr- 90 Y Beta Radiations

Synthesis and characterisation of LiB 3 O 5 nanophosphor as a TL dosimeter

Investigation of neutron sensitivity of un-doped and Dy-doped CaB4O7 for thermoluminescence applications

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Thermoluminescence Kinetic Parameters of TLD-600 and TLD-700 after ²⁵² Cf Neutron+Gamma and ⁹⁰ Sr- ⁹⁰ Y Beta Radiations

Thermoluminescence Kinetic Parameters of TLD-600 and TLD-700 after ²⁵² Cf Neutron+Gamma and ⁹⁰ Sr- ⁹⁰ Y Beta Radiations

Synthesis and characterisation of LiB ₃ O ₅ nanophosphor as a TL dosimeter