Dosimetric characterization of dyed solid dosimeters for gamma radiation
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2005
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INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE; ENCONTRO NACIONAL DE APLICACOES NUCLEARES, 7th
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Resumo
The solid dosimeters of dyed or undyed polymethylmethacrylate (PMMA), in the plate
form, are often used for routine monitoring in high-dose radiation processes.
Ionizing radiation induces changes in the absorption spectrum of some polymers at characteristic wavelength;
these changes can be related to absorbed dose. The dosimetric properties of dyed polymethylmethacrylate
plates of commercial use were studied to evaluate the viability to use this material in radiation dosimetry. For
dosimetric characterization PMMA samples were irradiated with 60Co gamma radiation in the dose range
between 0.5 and 100 kGy, using the facilities of the Centro de Tecnologia das Radiações of Ipen. For
the samples preparation and spectrophotometric evaluations the facilities of the Centro de Metrologia
das Radiações of Ipen were used. The samples (1 x 3 cm
2
) were obtained from plates with original dimension
of 120 x 60cm
2
; the plates thickness varied between 2.1 and 2.5mm. The studied parameters were: batch
homogeneity, ambient conditions sensibility and dose-response. The results were compared with the response
of Red 4034 Perspex and Gammachrome YR dosimeters, developed by Harwell Dosimeters that show good
performance in the quality control of the absorbed dose in the radiation processes. The evaluated samples
present adequate properties to be used as control dosimeter in radiation process. They don't present significant
variations with the ambient conditions and presents behavior similar to the comparative standards. Depending
on the dyed used, the useful dose range can be between 5 and 100 kGy.
Como referenciar
GALANTE, A.M.S.; CAMPOS, L.L. Dosimetric characterization of dyed solid dosimeters for gamma radiation. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE; ENCONTRO NACIONAL DE APLICACOES NUCLEARES, 7th, ago. 28 - set. 2, 2005, Santos, SP. Anais... Disponível em: http://repositorio.ipen.br/handle/123456789/17576. Acesso em: 29 Mar 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.