Thermoluminescence (TL) characterization of the perovskite-like KMgF<sub>3</sub>, activated by Lu impurity

Gónzález, Pedro Urra; Furetta, C.; Azorı́n, J.; Rivera, T.; Kitis, G.; Sepúlveda, Felipe D.; Sanipoli, C.

doi:10.1023/b:jmsc.0000016158.40738.d1

Cited by 16 publications

(9 citation statements)

References 16 publications

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“…6. The signal corresponds with a dose of 1.3 mGy which means 0,3 mGy/day, slightly higher than estimated but lower than the self-dose from 40 K in KMgF3:Tl (0,8 mGy/dag, [40]) and 87 Rb in RbMgF3:Eu (1.0 mGy/day, [41]). Simultaneously we measured the storage dose with Al2O3:C, a reference TL material, and found 5,6 μGy, so 1.3 μGy/day.…”

Section: Self Dosementioning

confidence: 69%

On energy storage of Lu2O3:Tb,M (M=Hf, Ti, Nb) sintered ceramics: Glow curves, dose-response dependence, radiation hardness and self-dose effect

Kulesza

Bos

Zych

2018

Journal of Alloys and Compounds

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Thermoluminescent properties and energy storage characteristics of Lu2O3:Tb,M (M=Hf, Ti, Nb) sintered ceramics induced by ionizing radiation are presented and discussed. Doseresponse dependence, radiation hardness and fading were studied. A linearity of the former exceeding seven orders of magnitude was confirmed for Lu2O3:Tb,Hf and Lu2O3:Tb,Nb ceramics. Lu2O3:Tb,Hf showed the best TL performance and also its fading was the lowest reaching 15 % over 7 hours and showed tendency to saturate. During the same period of time the Lu2O3:Tb,Ti, despite having TL at higher temperatures, lost about 25 % of the stored energy and the TL signal of Lu2O3:Tb,Nb faded by almost 40 % over 7 hours. First order TL kinetics was confirmed for all three compositions. A self-dose effect in Lu2O3:Tb,Hf due to a natural content of the radioactive isotope (2.6 %) was proved to be important for long-time reading of low doses.

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Section: Self Dosementioning

confidence: 69%

On energy storage of Lu2O3:Tb,M (M=Hf, Ti, Nb) sintered ceramics: Glow curves, dose-response dependence, radiation hardness and self-dose effect

Kulesza

Bos

Zych

2018

Journal of Alloys and Compounds

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“…In general, it turned out that rare-earth doped KMgF3 compounds constitute promising candidates to be employed as TL and OSL dosimeters. In particular, it was found that KMgF3 doped with Eu (Furetta et al, 1990;Gektin, 2000), Pb (Furetta et al, 1990;), Yb (Gambarini et al, 1996), Ce (Le , La (Sepulveda et al, 2004) and Lu (González et al, 2004) have shown to be good candidates for TL dosimetry, being much more efficient than some commercial TL dosimeters (Furetta et al, 1990;Gambarini et al, 1996;Gektin, 2000). On the other hand, the OSL dosimetric properties of this fluoroperovskite doped with Ce has shown high efficiency, even forty times higher than that of Al 2 O 3 :C (Le .…”

Section: Introductionmentioning

confidence: 99%

Caracterización de materiales luminiscentes tejido-equivalentes para la detección de radiación ionizante

Jiménez¹

2022

RIDAA Tesis Unicen

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De manera general, la detección de radiación ionizante se realiza a través de diferentes dosímetros como son: las cámaras de ionización (CI), los diodos, los dosímetros termoluminiscentes (TLD) y los de luminiscencia estimulada ópticamente (OSL), entre otros. Aunque las cámaras de ionización se utilizan en todos los centros de radioterapia, su uso es exclusivo en dosimetría física, la cual se realizan en fantomas de agua, que simulan la consistencia y la densidad de un órgano humano vivo. Las CI son de gran tamaño (∼27mm), necesitan correcciones por recombinación iónica, son frágiles, precisan cableado y presentan dependencia con la energía, lo cual dificulta su implementación en dosimetría clínica. Los diodos son frecuentemente utilizados debido a su tamaño pequeño y medición en tiempo real, no obstante, su respuesta presenta fluctuaciones con la temperatura, exhiben pérdida de sensibilidad con la dosis acumulada, necesitan ser pre-irradiados, deben ser calibrados para cada energía a utilizar y no son tejido-equivalentes. Los TLD son ampliamente utilizados por su buena equivalencia con el tejido biológico, su alta sensibilidad y su posibilidad de reutilización. A pesar del amplio uso de estos dosímetros, diversas organizaciones están migrando hacia la dosimetría OSL debido a las ventajas dosimétricas que posee con respecto a la TLD. Párrafo extraído de la tesis de posgrado a modo de resumen.

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“…* During the past years, KMgF 3 containing various kinds of dopants, i.e., Eu, Tl, Pb, Cr, Ag, Er and Ce have been produced, studied and the results published. The reported properties resulted to be very attractive for many dosimetric applications [1][2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

“…This self-dose effect was carefully investigated [6] and the TL contribution of 40 K to the total dose resulted to be ∼0.22 mGy/month. This value of the self-dose irradiation should not be a serious problem in dosimetric applications, where high dose levels have to be monitored, as in the case of clinical dosimetry.…”

Section: Introductionmentioning

confidence: 99%

Thermoluminescence characterization of LiMgF₃:DyF₃phosphors exposed to beta radiation

Bernal

Alday-Samaniego

Furetta

et al. 2007

Radiation Effects and Defects in Solids

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LiMgF 3 :DyF 3 phosphors were obtained as polycrystalline solids from the melting of component salts, with two DyF 3 concentrations, 2.02% mol and 4.04% mol. In order to guarantee the homogeneity of the composition, the samples were crushed and the resulting powder was pressed to form pellet-shaped phosphors, some of which were sintered at 700 • C for 5 h, under atmospheric air. Thermoluminescence measurements of beta irradiated samples show that these phosphors exhibit adequate properties to be considered for development of thermoluminescence dosimeters. Integrated thermoluminescence as a function of dose displays a linear dependence with dose for doses below 20.0 Gy.

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Thermoluminescence (TL) characterization of the perovskite-like KMgF₃, activated by Lu impurity

Cited by 16 publications

References 16 publications

On energy storage of Lu2O3:Tb,M (M=Hf, Ti, Nb) sintered ceramics: Glow curves, dose-response dependence, radiation hardness and self-dose effect

On energy storage of Lu2O3:Tb,M (M=Hf, Ti, Nb) sintered ceramics: Glow curves, dose-response dependence, radiation hardness and self-dose effect

Caracterización de materiales luminiscentes tejido-equivalentes para la detección de radiación ionizante

Thermoluminescence characterization of LiMgF₃:DyF₃phosphors exposed to beta radiation

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Thermoluminescence (TL) characterization of the perovskite-like KMgF3, activated by Lu impurity

Cited by 16 publications

References 16 publications

On energy storage of Lu2O3:Tb,M (M=Hf, Ti, Nb) sintered ceramics: Glow curves, dose-response dependence, radiation hardness and self-dose effect

On energy storage of Lu2O3:Tb,M (M=Hf, Ti, Nb) sintered ceramics: Glow curves, dose-response dependence, radiation hardness and self-dose effect

Caracterización de materiales luminiscentes tejido-equivalentes para la detección de radiación ionizante

Thermoluminescence characterization of LiMgF3:DyF3phosphors exposed to beta radiation

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Thermoluminescence (TL) characterization of the perovskite-like KMgF₃, activated by Lu impurity

Thermoluminescence characterization of LiMgF₃:DyF₃phosphors exposed to beta radiation