Radioluminescence of rare-earth doped potassium yttrium fluorides crystals

Molina, P.; Santiago, M.; Marcazzó, J.; Spano, Frank C.; Хайдуков, Н. М.; Caselli, E.

doi:10.1016/j.radmeas.2011.05.043

Cited by 9 publications

(9 citation statements)

References 25 publications

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“…Assuming that applicators were reconstructed accurately, the pattern agreement indicated that (a) in vivo point dosimetry was able to resolve positional shifts using the AEDA and (b) the in vivo data quality was comparable with TG-43 conditions, despite corrections for the Al 2 O 3 :C dosimeter material's energy and temperature dependence. Similar agreement would therefore be expected for organic scintillator probes despite their recently observed temperature dependence, 22,23 and also for MOSFETs 8,12 and fiber-coupled radioluminescence dosimeters [24][25][26][27][28][29] despite their water nonequivalence.…”

Section: D Simulated False Errors: Dosimeter Shiftssupporting

confidence: 79%

Adaptive error detection for HDR/PDR brachytherapy: Guidance for decision making during real-time in vivo point dosimetry

2014

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The study demonstrates that the AEDA error identification during HDR/PDR BT relies on a stable dosimeter position rather than on an accurate dosimeter reconstruction, and the AEDA's capacity to distinguish between true and false error scenarios. The study further shows that the AEDA can offer guidance in decision making in the event of potential errors detected with real-time in vivo point dosimetry.

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Section: D Simulated False Errors: Dosimeter Shiftssupporting

confidence: 79%

Adaptive error detection for HDR/PDR brachytherapy: Guidance for decision making during real-time in vivo point dosimetry

2014

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“…Además, una pequeña señal de fosforescencia es observada, es decir, afterglow en los primeros 5 s de la irradiación y luego desaparece completamente. Esto representa una ventaja con respecto al dosímetro comercial Al 2 O 3 dopado con carbono cuyo afterglow podría seguir siendo importante después de varios minutos después de la irradiación [58,61]. Por lo mencionado anteriormente, se determinó que el topacio sintético obtenido a partir de (Al(OH) 3 ) presenta la mayor emisión RL de esta serie de compuestos para ser aplicada en dosimetría RL.…”

Section: Respuesta Rlunclassified

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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“…In particular, the stimulation transitions at 312 nm corresponding to the displacements from the 8 S 7/2 base level to the 6 P J excited levels of ion Gd 3+ are very high, but conversely the 6 P J → 8 S 7/2 emission transitions (312 nm) are not detected in the PL spectrum. Thus, with the existence of the Gd 3+ −Tb 3+ ion pair, the stimulating energies of the 6 P J , 6 I J and 6 D J levels of Gd 3+ ions can be efficiently transferred to Tb 3+ ions. These processes enhance the luminescence in the visible range of the phosphor.…”

Section: Pl Propertiesmentioning

confidence: 99%

“…Thus, the quantum transfer mechanism in the material will follow the rules shown in figure 6b. When the Gd 3+ ion receives the excited energy, the energy of 6 P J , 6 I J and 6 D J levels will be transmitted to the 5 H J , 5 F J and 5 K J levels of the Tb 3+ ion by T1, T2 and T3 processes, respectively.…”

Section: Pl Propertiesmentioning

confidence: 99%

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Structure and luminescence properties of $$\hbox {K}_{{2}}\hbox {GdF}_{{5}}$$ K 2 GdF 5 : $$\hbox {Tb}^{3+}$$ Tb 3 + synthesized by solid-state reaction method

2019

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K 2 GdF 5 :Tb 3+ material used in dosimetry field was synthesized by solid-state reaction method. The scanning electron microscopy image showed that the material exhibits porous surface with a very large surface area. The photoluminescence spectrum confirmed energy transfer process from Gd 3+ ions to Tb 3+ ions, and the luminescence of this material was entirely due to Tb ions. The high luminescent intensity at 542 nm was perfectly consistent with the sensitive wavelength range of photomultiplier tubes in the thermoluminescence (TL) reader. The TL-glow curve was very simple with the temperatures of the main peak in the range from 200 to 230 • C, and the glow-curve shape was suitable for dosimetry purposes. The TL intensities of K 2 GdF 5 :10 mol% Tb 3+ was higher than that of common CaSO 4 :Dy 3+ dosimeters. The estimation on available application of the prepared material in neutron dose measurement was carried out.

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Radioluminescence of rare-earth doped potassium yttrium fluorides crystals

Cited by 9 publications

References 25 publications

Adaptive error detection for HDR/PDR brachytherapy: Guidance for decision making during real-time in vivo point dosimetry

Adaptive error detection for HDR/PDR brachytherapy: Guidance for decision making during real-time in vivo point dosimetry

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

Structure and luminescence properties of $$\hbox {K}_{{2}}\hbox {GdF}_{{5}}$$ K 2 GdF 5 : $$\hbox {Tb}^{3+}$$ Tb 3 + synthesized by solid-state reaction method

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