Termoluminescência de materiais e sua aplicação em dosimetria da radiação

Campos, L.L.

doi:10.1590/s0366-69131998000600007

Cited by 18 publications

(28 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…When an impurity is inserted into the crystal structure, capture centers (traps) may be created in the forbidden band. The TL signal shows peaks at certain temperatures associated with a trap [1,2]. Some important features are important for a TL dosimeter, such as high sensitivity, linear response for a wide dose range, stability and a glow curve with a single thermoluminescent peak [1].…”

Section: Introductionmentioning

confidence: 99%

Study of a new glass matrix by thermoluminescent technique for high-dose dosimetry

Ferreira¹,

Carvalho²,

Dantas³

et al. 2017

Braz. J. Rad. Sci.

View full text Add to dashboard Cite

The thermoluminescence technique is widely used for both personal and high-dose dosimetry. In this work, the thermoluminescence technique was employed to study a new glass matrix, with nominal composition of 20Li2CO3.10Al2O3.30BaO.40B2O3 (mol%), irradiated with different doses in a 60 Co radioactive source. The glow curves and the dose-response curve were obtained for radiation doses of 10, 50, 100, 200 and 700 Gy. The results showed that this new glass matrix has potential use in high-dose dosimetry.

show abstract

Section: Introductionmentioning

confidence: 99%

Study of a new glass matrix by thermoluminescent technique for high-dose dosimetry

Ferreira¹,

Carvalho²,

Dantas³

et al. 2017

Braz. J. Rad. Sci.

View full text Add to dashboard Cite

show abstract

“…Since the general description of TL applications reported by Daniels and colleagues 1 , TL dosimetry has been useful in areas requiring personal and environmental monitoring, clinical procedures and industrial applications. A variety of TL dosimeters (TLD) manufactured with different materials and geometries and capable to measure doses from 10 -6 to 10 3 Gy is now available, but the crescent use of ionising radiation has continuously encouraging new investigations in TL materials [2][3][4][5][6] . TL emission of α-quartz has extensively been used in retrospective dosimetry, in particular for dating archaeological and geological materials containing quartz grains such as sediments, burnt stones and fired clays [7][8][9] .…”

Section: Introductionmentioning

confidence: 99%

“…The main properties are: sensitivity; reproducibility and long term-stability of the stored information; linearity of the TL signal with radiation dose and low dependence of the TL emission on the photon energy [2][3][4] . It is also necessary to find a suitable procedure to manufacture low-cost TLDs with enough resistance against handling and environmental factors such as humidity and solvents.…”

Section: Introductionmentioning

confidence: 99%

Manufacturing polycrystalline pellets of natural quartz for applications in thermoluminescence dosimetry

et al. 2012

View full text Add to dashboard Cite

This paper describes the manufacturing process of quartz-pellets and shows their potential use as thermoluminescence dosimeters (TLD) for those applications where low-levels of ionising radiation are present. Two batches of cold-pressed pellets were produced and their resistance were evaluated by vibration tests and weight-loss measurements. The batch manufactured with 75 × 150 µm particles showed enough resistance to be employed as TLD. The dosimetric properties of the 310 °C peak appearing in the glow curves of these pellets were characterized together with commercial TLD-100 units using γ-and X-ray beams with different energies. The uncertainties related to reproducibility and stability of the TL signal were better than 10%. The sensitivity and the linearity of the TL response of quartz-pellets were better than that measured for TLD-100 for doses ranging from 0.5 to 200 mGy. The energy dependence of the quartz-pellets was higher than that of TLD-100 but it cannot be considered a restriction to their use in clinical procedures and industrial applications.

show abstract

“…Os materiais mais utilizados em dosimetria pessoal são LiF:Mg,Ti, o LiF:Mg,Cu,P e o Al 2 O 3 , por possuírem número atômico efetivo próximo ao do tecido, e o CaF 2 e o CaSO 4 :Dy, por sua alta sensibilidade (Campos, 1998).…”

Section: Dosímetros Termoluminescentesunclassified

“…A este último comportamento dá-se o nome de supralinearidade (Campos, 1998 supralinearidade, e precisa ser considerado para muitas aplicações em radioterapia. Em doses de radiações muito mais altas, a sensibilidade relativa diminui novamente em razão do dano da radiação ao detector (Metcalfe et al, 1997).…”

Section: Dosímetros Termoluminescentesunclassified

Implementação da irradiação de corpo inteiro em radioterapia

Habitzreuter¹

View full text Add to dashboard Cite

Neste trabalho estão descritos todos os parâmetros e medidas necessárias para a implementação da irradiação de corpo inteiro numa instalação projetada para tratamentos convencionais, e que faz uso de geometrias não convencionais para gerar os tamanhos de campos alargados. Além disso, são apresentados os dados de comissionamento desta modalidade no Hospital das Clínicas de São Paulo utilizando a comparação de três tipos de detectores para medidas de dose de entrada durante tratamentos de irradiação de corpo inteiro. 4 IMPLEMENTATION OF TOTAL BODY IRRADIATION IN RADIOTHERAPY Ângela Beatriz Habitzreuter ABSTRACTBefore implementing a treatment technique, the characteristics of the beam under irradiation conditions must be well acknowledged and studied. Each one of the parameters used to calculate the dose has to be measured and validated before its utilization in clinical practice. This is particularly necessary when dealing with special techniques.In this work, all necessary parameters and measurements are described for the total body irradiation implementation in facilities designed for conventional treatments that make use of unconventional geometries to generate desired enlarged field sizes. Furthermore, this work presents commissioning data of this modality at Hospital das Clínicas of São Paulo using comparison of three detectors types for measurements of entrance dose during total body irradiation treatment.

show abstract

Termoluminescência de materiais e sua aplicação em dosimetria da radiação

Cited by 18 publications

References 15 publications

Study of a new glass matrix by thermoluminescent technique for high-dose dosimetry

Study of a new glass matrix by thermoluminescent technique for high-dose dosimetry

Manufacturing polycrystalline pellets of natural quartz for applications in thermoluminescence dosimetry

Implementação da irradiação de corpo inteiro em radioterapia

Contact Info

Product

Resources

About