Superlinear dose dependence of high temperature thermoluminescence peaks in Al2O3:C

Lo, Dennis; Lawless, J.L.; Chen, R.

doi:10.1093/rpd/nci642

Cited by 15 publications

(7 citation statements)

References 10 publications

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“…This typical figure-of-S behavior is also encountered with Luxel and In-Light dosimeters [16]. This difference is usually attributed to the high deep trap concentration in Landauer alumina crystals [17].…”

Section: B Osl Response With Dosementioning

confidence: 60%

Multichannel Dosimeter and $\alpha$-Al$_{2}$O$_{3}$:C Optically Stimulated Luminescence (OSL) Fiber Sensors for Use in Radiation Therapy—Evaluation With Photon Beams

Magne

Carlan

Bordy

et al. 2011

IEEE Trans. Nucl. Sci.

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A multichannel OSL fiber optic dosimeter based on optically stimulated luminescence (OSL) of alumina is proposed for online in vivo dosimetry (IVD) in radiation therapy (RT). Two types of dosimetric-grade Al 2 O 3 : C crystals are compared and show different behavior according to manufacturing process. Metrological validations have been performed with a Saturne 43 LINAC in reference conditions at CEA LIST LNHB (French Ionizing Radiation Reference Laboratory). The dose response of OSL integrals under photon beam irradiation (6, 12, and 20 MV) show sublinearity behavior modeled by second-order equations and exhibit a small energy dependence (between 0.7% and 1.4%), explained by a modified intermediate cavity model adapted to a LINAC photon spectrum. Preclinical tests at Institut Gustave Roussy (IGR) prove that a proper design for a PMMA build-up cap leads to a low dependence vs photon beam orientation ( 1.5% and 0.9%) and vs field size in view of surface measurements.

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Section: B Osl Response With Dosementioning

confidence: 60%

Multichannel Dosimeter and $\alpha$-Al$_{2}$O$_{3}$:C Optically Stimulated Luminescence (OSL) Fiber Sensors for Use in Radiation Therapy—Evaluation With Photon Beams

Magne

Carlan

Bordy

et al. 2011

IEEE Trans. Nucl. Sci.

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“…Peak C at 730 K was also observed in anion‐deficient aluminum oxide crystals exposed to high doses of a pulse electron beam and beta radiation, as well as in α‐Al 2 O 3 crystals thermally and radiationally treated with UV radiation. [ 9,30–32 ]…”

Section: Resultsmentioning

confidence: 99%

“…[ 32 ] There are literature data on successful applications of the peak at 730 K in the single crystalline aluminum oxide for TL dosimetry of high doses of beta, pulse electron, and X‐ray radiation. [ 9,10,30 ]…”

Section: Resultsmentioning

confidence: 99%

“…Peak C at 730 K was also observed in anion-deficient aluminum oxide crystals exposed to high doses of a pulse electron beam and beta radiation, as well as in α-Al 2 O 3 crystals thermally and radiationally treated with UV radiation. [9,[30][31][32] It was previously hypothesized that the trap caused by the peak at 730 K in the single crystal aluminum oxide had an electron nature. [9] This conclusion was made from analyzing sensitization effects of dosimetric peak TL when the population of deep traps varied.…”

Section: Introductionmentioning

confidence: 99%

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Spectrally Resolved Thermoluminescence of Anion‐Deficient Al₂O₃–BeO Ceramics for High‐Dose Dosimetry

Nikiforov

Ananchenko

Borbolin

et al. 2020

Physica Status Solidi (a)

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Thermoluminescence (TL) curves of Al2O3–BeO ceramic samples synthesized during high‐temperature treatment of nanostructured Al2O3 compacts in vacuum with the presence of graphite in BeO crucibles are studied. Temperature ranges of certain TL peaks emission at the synthesis temperature varied from 1200 to 1400 °C are found. A comparative analysis of the TL peaks temperature position and the nature of traps in the obtained ceramics with single crystalline Al2O3, BeO, and BeAl2O4 analogs is carried out. Spectral composition of different TL peaks is investigated. It is found that oxygen vacancies and their aggregates play the main role in the TL emission centers formation in the samples under study. A complex structure of the dominating luminescence band at 4.0 eV in the dosimetric peak at 530 K of the ceramics synthesized at 1400 °C is found. This band is shown to be a superposition of three bands with the maxima at 3.11, 3.80, and 4.17 eV, resulted from F, F+ centers and presumably from Fcat‐type centers in aluminum oxide. The obtained results are essential to control and modify TL properties of Al2O3–BeO ceramics to create luminescence detectors of high‐dose radiation.

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“…The linearity range and non linearity behaviour depend on the type of material and its physical characteristics, [20]. The linear dose response relationship is so called because the response is directly proportional to the dose.…”

Section: Dose Responsementioning

confidence: 99%

Radiation Dose Effect of Thermo luminescence on γ-Al2O3: C

Aligba¹,

N²,

Iortile³

2017

IOSR JAP

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This study aims to investigate the effects of radiation dose on the TL of γ-Al 2 O 3 :C.The material was exposed to beta radiation using the Risø TL/OSL-DA-15 Reader equipped with a 90 Sr/ 90 Y beta irradiator. The luminescence signals were measured by initially heating the samples at a heating rate of 5 o C/s from room temperature (RT) to 500 o C following β-irradiation and the glow curves, dose response determined respectively. The sample, doped with 1.0g of carbon graphite showed clear TL peaks at 256, 254, 242, and 244 o C at 0.5Gy, 1.0Gy, 5.0Gy and 10.0Gy respectively. Dose response curve analysis showed a linear response in the dose range from 0.5Gy to 10Gy. With the results obtained, it can be concluded that the TL of γ-Al 2 O 3 :C increases with increase in radiation dose and this indicates that this material is suitable for personnel dosimetric applications.

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Superlinear dose dependence of high temperature thermoluminescence peaks in Al2O3:C

Cited by 15 publications

References 10 publications

Multichannel Dosimeter and $\alpha$-Al$_{2}$O$_{3}$:C Optically Stimulated Luminescence (OSL) Fiber Sensors for Use in Radiation Therapy—Evaluation With Photon Beams

Multichannel Dosimeter and $\alpha$-Al$_{2}$O$_{3}$:C Optically Stimulated Luminescence (OSL) Fiber Sensors for Use in Radiation Therapy—Evaluation With Photon Beams

Spectrally Resolved Thermoluminescence of Anion‐Deficient Al₂O₃–BeO Ceramics for High‐Dose Dosimetry

Radiation Dose Effect of Thermo luminescence on γ-Al2O3: C

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Superlinear dose dependence of high temperature thermoluminescence peaks in Al2O3:C

Cited by 15 publications

References 10 publications

Multichannel Dosimeter and $\alpha$-Al$_{2}$O$_{3}$:C Optically Stimulated Luminescence (OSL) Fiber Sensors for Use in Radiation Therapy—Evaluation With Photon Beams

Multichannel Dosimeter and $\alpha$-Al$_{2}$O$_{3}$:C Optically Stimulated Luminescence (OSL) Fiber Sensors for Use in Radiation Therapy—Evaluation With Photon Beams

Spectrally Resolved Thermoluminescence of Anion‐Deficient Al2O3–BeO Ceramics for High‐Dose Dosimetry

Radiation Dose Effect of Thermo luminescence on γ-Al2O3: C

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Spectrally Resolved Thermoluminescence of Anion‐Deficient Al₂O₃–BeO Ceramics for High‐Dose Dosimetry