Evaluation of dose in radiotherapy using solid state composites based on natural colourless topaz
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2001
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INTERNATIONAL SYMPOSIUM NEW TRENDS IN BIOPHYSICS
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Resumo
The thermoluminescent properties of composites containing powdered topaz embedded in Teflon or glass were
studied and compared with the corresponding properties of the well known TLD-100 commercial dosimeters. Relative
sensitivity, TL fading, reproducibility of the sample preparation process, and possibility of re-utilisation of the
dosimeters were investigated. Measurements of absorbed doses in simulated radiotherapy treatments were also taken.
The irradiations were performed using g rays from a 60Co source in the dose range from 1 cGy to 2 Gy. The dosimeters
were installed in badges and attached inside acrylic plates of various thicknesses in the radiation fields. The dose profiles
obtained with this procedure are very similar to the ones obtained with equivalent tissues. It is concluded that these
composites of natural colourless topaz crystals can be efficiently used as TL dosimeters.
Como referenciar
SOUZA, D.N.; MEIRA, R.A.; LIMA, J.F.; VALERIO, M.E.G.; CALDAS, L.V.E. Evaluation of dose in radiotherapy using solid state composites based on natural colourless topaz. In: INTERNATIONAL SYMPOSIUM NEW TRENDS IN BIOPHYSICS, Sept. 23-26, 2001, Recife, PE. Abstract... DOI: 10.1016/S0969-8043(03)00033-2. Disponível em: http://repositorio.ipen.br/handle/123456789/21792. Acesso em: 30 Dec 2025.
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