Normal and anomalous heating rate effects on thermoluminescence of Ce-doped ZnB 2 O 4

Doǧan, Tamer; Yüksel, Mehmet; Akça, Sibel; Portakal, Z.G.; Balci-Yegen, S.; Küçük, N.; Topaksu, M.

doi:10.1016/j.apradiso.2017.07.032

Cited by 30 publications

(4 citation statements)

References 30 publications

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“…A similar kind of behavior was recorded in 5.12 Gy irradiated MgO: Al 3+ , Li + where the glow curves are shifted to higher temperatures and the intensity is quenched with increments to the heating rate ( Mofokeng et al, 2020 ). The shifting of the glow curves was attributed to temperature lagging, and the lowering of intensity to thermal quenching ( Dogan et al, 2017 ; Singha and Kaintha, 2018 ).…”

Section: Resultsmentioning

confidence: 99%

Green synthesis of MgO nanoparticles and its antibacterial properties

et al. 2023

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Magnesium oxide nanostructured particles (NP) were prepared using a simple solution combustion technique using different leaf extracts such as Mangifera indica (Mango - Ma), Azadirachta indica (Neem—Ne), and Carica papaya (Papaya—Pa) as surfactants. The highly crystalline phase of MgO nanostructures was confirmed by PXRD and FTIR studies for 2 h 500°C calcined samples. To analyze the characteristics of obtained material–MaNP, NeNP, and PaNP for dosimetry applications, thermoluminescence (TL) studies were carried out for Co-60 gamma rays irradiated samples in the dose range 10–50 KGy; PaNP and NeNP exhibited well-defined glow curve when compared with MaNP samples. In addition, it was observed that the TL intensity decreases, with increase in gamma dose and the glow peak temperature is shifted towards the higher temperature with the increase in heating rate. The glow peak was segregated using glow curve deconvolution and thermal cleaning method. Kinetic parameters estimated using Chen’s method, trap depth (E), and frequency factor (s) were found to be 0.699, 7.408, 0.4929, and 38.71, 11.008, and 10.71 for PaNP, NeNP, and MaNP respectively. The well-resolved glow curve, good linear behavior in the dose range of 10–50, KGy, and less fading were observed in PaNP as compared with MaNP and NeNP. Further, the antibacterial activity was checked against human pathogens such as Escherichia coli, Staphylococcus aureus, and Pseudomonas aeruginosa. A visible zone of clearance was observed at 200 and 100 μg/mL by the PaNP and NeNP, indicating the death of colonies by the nanoparticles. Therefore, PaNP nanomaterial is a potential phosphor material for dosimetry and antibacterial application compared to NeNP and MaNP.

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Section: Resultsmentioning

confidence: 99%

Green synthesis of MgO nanoparticles and its antibacterial properties

et al. 2023

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“…Thermoluminescence emission is known to be dependent on HR, in accordance with the normal kinetics TL process . Peak height of a normalized TL signal (TL/ β ), where β is the HR value, should decrease with increasing HR due to diminishing luminescence efficiency based on the raised probability of nonradiative transitions . Here, maximum temperature shifted to higher temperatures as HR increased due to a temperature gradient effect and normalized TL intensity decreased in a normal HR effect.…”

Section: Resultsmentioning

confidence: 99%

Thermoluminescence emission on lead oxychloroborate glasses under UV exposure

et al. 2019

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Glassy materials were prepared using two different systems: 50B 2 O 3 -(50 − x)PbO − xPbCl 2, with x = 0, 2 and 5 in mol % (System BPCl-I) and 50BO 1.5 -(50 − x)PbO − xPbCl 2 with x = 0, 2, 5 and 7 in cationic % (System BPCl-II). Structural and optical characterization showed that PbCl when substituted for PbO changed the structure of the glass network by replacing nonbridging oxygens for chlorine ions. This substitution also caused a change in the number of defects responsible for thermoluminescence (TL) emission (electrons and hole trap centres). Thermoluminescence emissions were observed for the first time in lead oxychloroborate glasses after exposure to UV radiation. Sample BPCl-I-2 (x = 2 from System I) demonstrated better TL emission compared with other glass samples. One intense peak in the glow curve, centred at 122°C followed by a shoulder at~180°C, was highly sensitive to UV radiation. There were also good linear responses at dose range~0.4 to~2 J/cm 2 for the first peak (low temperature) and~0.4 to~4 J/cm 2 for the second peak (high temperature).

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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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Normal and anomalous heating rate effects on thermoluminescence of Ce-doped ZnB 2 O 4

Cited by 30 publications

References 30 publications

Green synthesis of MgO nanoparticles and its antibacterial properties

Green synthesis of MgO nanoparticles and its antibacterial properties

Thermoluminescence emission on lead oxychloroborate glasses under UV exposure

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

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