Annealing Procedures for Commonly Used Radiothermoluminescent Materials

Driscoll, C.M.H.; Barthe, J.; Oberhofer, M.; Busuoli, G.; Hickman, C.

doi:10.1093/oxfordjournals.rpd.a079618

Cited by 31 publications

(7 citation statements)

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“…To maintain the same sensitivities for the detectors, it is critical to follow a consistent annealing procedure. The general consensus on the optimal annealing procedure for LiF,Mg,Ti is to anneal for 1 h at 400°C followed by 16–24 h at 80°C, although shorter annealing periods may suffice The high‐temperature component eliminates the previous dose information while the low‐temperature component restores the original shape of the glow curve thus maintaining the sensitivity of the TLD. With careful annealing, the sensitivity of each TLD will change minimally, including both the average sensitivity of the TLDs and the relative sensitivity of each element ( k s,i ).…”

Section: Reusementioning

confidence: 99%

AAPM TG 191: Clinical use of luminescent dosimeters: TLDs and OSLDs

Kry

Alvarez

Cygler³

et al. 2019

Medical Physics

126

142

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Thermoluminescent dosimeters (TLD) and optically stimulated luminescent dosimeters (OSLD) are practical, accurate, and precise tools for point dosimetry in medical physics applications. The charges of Task Group 191 were to detail the methodologies for practical and optimal luminescence dosimetry in a clinical setting. This includes: (a) to review the variety of TLD/OSLD materials available, including features and limitations of each; (b) to outline the optimal steps to achieve accurate and precise dosimetry with luminescent detectors and to evaluate the uncertainty induced when less rigorous procedures are used; (c) to develop consensus guidelines on the optimal use of luminescent dosimeters for clinical practice; and (d) to develop guidelines for special medically relevant uses of TLDs/OSLDs such as mixed photon/neutron field dosimetry, particle beam dosimetry, and skin dosimetry. While this report provides general guidelines for TLD and OSLD processes, the report provides specific details for TLD‐100 and nanoDotTM dosimeters because of their prevalence in clinical practice.

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Section: Reusementioning

confidence: 99%

AAPM TG 191: Clinical use of luminescent dosimeters: TLDs and OSLDs

Kry

Alvarez

Cygler³

et al. 2019

Medical Physics

126

142

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“…After 1 h of irradiation the samples were preheated to 100 • C for 100 s, and the TL spectrum was read out. The advantage of this post-irradiation heat treatment is to remove the low temperature peaks and to stabilize the trapping centers [16]. Important modifications in the shape of the glow curve are observed as a result of thermal treatment prior to irradiations.…”

Section: Thermal Treatmentmentioning

confidence: 99%

“…A marked growth in the main doismetry peak is observed with storage time. This is thought to result from the migration and aggregation of low-temperature trapping centers to form more stable complex centers, which yield thermoluminescence peaks at high temperatures [16].…”

Section: Thermoluminescence Fadingmentioning

confidence: 99%

Thermoluminescence of the blue emission band of perthite

Soliman¹

2004

Radiation Effects and Defects in Solids

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The thermoluminescence (TL) glow curve of natural monoclinic perthite has a broad band with peaks at 210, 250, 290 and 340 • C in the blue region. The initial rise measurements indicate that these peaks have thermal activation energies of 0.96, 1.12, 1.18 and 1.21 eV, respectively. The laboratory-induced peaks at 120, 150 and 200 • C have thermal activation energies of 0.12, 0.23 and 0.59 eV, respectively. The pre-heat at 900 • C for 2 h and air-cooling enhanced the TL sensitivity of perthite by up to ∼4 times of that annealed at 400 • C.Thermoluminescence fading of the disordered perthite was monitored six months after storage in the dark at room temperature. The properties of fading are well explained with the localized transition model. The results show that perthite is a promising material for dosimetry of luminescence dating.

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“…Após a leitura, o cristal pode ou não se encontrar no seu estado original de energia, podendo haver a necessidade de um tratamento térmico especial para reutilização do mesmo [21].…”

Section: Modelo De Bandas Em Dosimetria Tlunclassified

“…Este aquecimento tem o propósito de minimizar a contribuição de picos de baixa temperatura, através da redução do decaimento térmico do sinal TL [21]. …”

Section: Procedimento De Inicializaçãounclassified

Implementação de uma análise computadorizada da curva de emissão termoluminescente e aplicação em dosimetria clínica

Ferreira¹

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Annealing Procedures for Commonly Used Radiothermoluminescent Materials

Cited by 31 publications

References 0 publications

AAPM TG 191: Clinical use of luminescent dosimeters: TLDs and OSLDs

AAPM TG 191: Clinical use of luminescent dosimeters: TLDs and OSLDs

Thermoluminescence of the blue emission band of perthite

Implementação de uma análise computadorizada da curva de emissão termoluminescente e aplicação em dosimetria clínica

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