Optically and thermally stimulated luminescence characteristics of LaAlO 3 :Pr 3+ beta irradiated

León-Alfaro, M.A. de; Morales-Hernández, A; Roman-Lopez, J.; Zárate‐Medina, J.; Rivera-Montalvo, T.

doi:10.1016/j.apradiso.2017.11.020

Cited by 10 publications

(3 citation statements)

References 22 publications

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“…The 190°C correspond shallow traps and the second one (260°C) indicates the existence of deeper traps. These peaks are in different position and shifting in the temperature position when the powders are irradiated with other X-ray energies [12] or irradiated using beta particles [13]. TL glow curve of the powders indicate the trap is being activated within the particular temperature range with its own value of activation energy (E) and frequency factor (s).…”

Section: Resultsmentioning

confidence: 99%

Thermoluminescent response of LaAlO₃:Pr³⁺ under X-ray beams effect

Vazquez-Flores¹,

Vázquez-Cerón²,

Osorio-Valero

et al. 2022

J. Phys.: Conf. Ser.

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Thermoluminescent (TL) dosimeters are the most used, since they can store information, due to exposure to radiation. Rare earth doped lanthanum aluminate (LaAlO3) ceramic has attracted great attention in recent years for many applications because it shows excellent properties such as thermal stability, color light emission as well as high thermoluminescent intensity. In the present work, TL glow curve under diagnostic X-ray beam was obtained. According to the literature, procedures in interventional cardiology are Thermoluminescent glow curve was analyzed using a Harshaw 3500 TL reader coupled to a personal computer for storage information and future analysis. For irradiation processes was used a diagnostic X-ray source Siemens 256-slice computed tomography (CT) Somaton drive model. TL response of trivalent praseodymium doped lanthanum aluminate as a function of dopant concentration was increasing as concentrations of Pr3+ ion in LaAlO3 was increased. The increase in TL glow peak sensitivity was increased up to 2 % concentration of Pr3+ ion. This TL glow curve exhibited a broad peak centered at 190°C and little shoulder which is consider as the second peak centered at 260°C respectively. The nature of the glow curve form in samples is attributed to at least one type of the trap with relates at least one type of the defect. After experimental results LaAlO3:Pr3+ can be used as thermoluminescent material for diagnostic X-ray beams measurements.

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Section: Resultsmentioning

confidence: 99%

Thermoluminescent response of LaAlO₃:Pr³⁺ under X-ray beams effect

Vazquez-Flores¹,

Vázquez-Cerón²,

Osorio-Valero

et al. 2022

J. Phys.: Conf. Ser.

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“…Additionally, below 50 K, the emission spectra were somewhat shifted to a longer wavelengths with broadened FWHM. The emission intensity decrease with lowering temperature, called as a low-temperature luminescence quenching, may be related to the thermally stimulated luminescence (TSL) phenomena of the nanophosphor and/or defect-inherited luminescent materials [ 20 , 21 , 22 ]. The abrupt decreased emission intensity for the nanophosphor synthesized at pH = 10 with higher surface trap density, as shown in Figure 4 b, clearly indicates the surface-induced luminescence quenching.…”

Section: Resultsmentioning

confidence: 99%

Luminescence Quenching Behavior of Hydrothermally Grown YVO4:Eu3+ Nanophosphor Excited under Low Temperature and Vacuum Ultra Violet Discharge

Park

Lee

et al. 2020

Materials

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The luminescence quenching behavior and energy transfer process in hydrothermally grown Eu3+-doped YVO4 nanophosphors were studied using low temperature photoluminescence spectroscopy. The luminescence efficiency of nanophosphor is dependent on the acidity of its solution media and the post annealing condition after hydrothermal processing. The overall results suggest that the abnormal luminescence behavior of Eu3+-doped nanocrystalline YVO4 under low temperature photoexcitation is due to the incorporated non-radiative hydroxyl groups often encountered in hydrothermal synthesis as well as to the inefficient energy transfer to luminescent ions from vanadate groups.

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“…The other method chosen was the citrate precursor modified method (CPM), a variation of the Pechini method, excluding the chelation process. It is distinguished by the excellent dispersion of the starter ions achieved through the citrate process, which decreases the probability of segregation [11].…”

Section: Introductionmentioning

confidence: 99%

Influence of the synthesis pathway upon the thermoluminescent response of gadolinium aluminate matrix phosphors

Alonso Sotolongo,

Montalvo,

Zárate Medina

2024

J. Phys.: Conf. Ser.

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The phosphors endowed with a glow curve have a peak much more intense than the others, sensitization to low doses, and a linear relationship between the thermoluminescent response and the dose, which are in demand in the dosimetry market. The gadolinium aluminate has been successfully used as a host lattice of phosphors with luminescent properties. Principally, the luminescent response of the said matrix has been improved by doping with rare earth ions. The thermoluminescent signal depends on the synthesis route because the defect density of a crystal is closely connected to the production pathway that the material went through. Therefore, a crucial step in sensitizing a phosphor is selecting a synthesis route that enhances the efficiency of its thermoluminescent mechanisms. The research herein focused on synthesizing phosphors composed of gadolinium aluminate with no dopant and doped with two molar percent of dysprosium, using two different routes. Among the two synthesis pathways, it was determined to be the most suitable for enhancing the thermoluminescent response of the aforementioned phosphors. The methods employed were reverse coprecipitation and the modified citrate precursor. The phosphors obtained by the reverse coprecipitation method showed the most sensitive thermoluminescent signal. Mainly, the phosphor activated with the dysprosium ion produced the most intense signal, suggesting an improvement in the thermoluminescent mechanisms due to the dopant insertion.

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Optically and thermally stimulated luminescence characteristics of LaAlO 3 :Pr 3+ beta irradiated

Cited by 10 publications

References 22 publications

Thermoluminescent response of LaAlO₃:Pr³⁺ under X-ray beams effect

Thermoluminescent response of LaAlO₃:Pr³⁺ under X-ray beams effect

Luminescence Quenching Behavior of Hydrothermally Grown YVO4:Eu3+ Nanophosphor Excited under Low Temperature and Vacuum Ultra Violet Discharge

Influence of the synthesis pathway upon the thermoluminescent response of gadolinium aluminate matrix phosphors

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Optically and thermally stimulated luminescence characteristics of LaAlO 3 :Pr 3+ beta irradiated

Cited by 10 publications

References 22 publications

Thermoluminescent response of LaAlO3:Pr3+ under X-ray beams effect

Thermoluminescent response of LaAlO3:Pr3+ under X-ray beams effect

Luminescence Quenching Behavior of Hydrothermally Grown YVO4:Eu3+ Nanophosphor Excited under Low Temperature and Vacuum Ultra Violet Discharge

Influence of the synthesis pathway upon the thermoluminescent response of gadolinium aluminate matrix phosphors

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Thermoluminescent response of LaAlO₃:Pr³⁺ under X-ray beams effect

Thermoluminescent response of LaAlO₃:Pr³⁺ under X-ray beams effect