Evaluation of the FTIR technique for the linearity assessment of commercial soda-lime glass irradiated with gamma radiation
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2019
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INTERNATIONAL CONFERENCE ON DOSIMETRY AND ITS APPLICATIONS, 3rd
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Introduction
High dose dosimetry is one of the most important branches of everyday activities related to
medical and industrial applications. Nevertheless, the use of materials that respond in a linear
manner has advantages over nonlinear materials, since the dose calculation procedure in linear
materials relies solely upon direct proportions to the delivered dose. The evaluation techniques
are also important to identify the possible linear ranges, and the new Fourier-transform infrared
spectroscopy (FTIR) technique has been used to this objective. This work aims to investigate
the linearity response and its sensitivity, using mainly the FTIR technique.
Methods
Cubic samples of a soda-lime glass type with composition of Li2O.2B2O3 + 10 mol% of (0.25Li2O
+ 0.25La2O3 + TiO2) were irradiated with doses from 1 kGy to 12 kGy, using a 60Co Gamma-Cell
system 220. The response was evaluated using the FTIR technique.
Results
The sensitivity and linearity characteristics were evaluated with the absorbed profi les of the
multivariate calibration Partial Least Square Regression (PLSR), with its loadings performing a
linear regression; from the slope value, the sensitivity of the glass at the absorbed dose range
was obtained. The PLSR technique showed, on the range of 1-12 kGy, that the soda-lime glass
type presents linearity value of 0.8532 using just three components. The results of the linearity
test were obtained for the FTIR technique.
Conclusions
The FTIR technique was applied to assess the linear behavior based of the glass spectrum,
showing its usefulness to identify possible linear dose regions and also the overall sensitivity
of the glass samples to dose. Therefore, the results obtained indicate a good linear response,
showing therefore a potential use of this glass-soda lime type for radiation dosimetry in high
doses.
Como referenciar
OLIVEIRA, LUCAS N. de; NASCIMENTO, ERIBERTO O.; ANDREETA, MARCELLO R.B.; YAMAGUSHI, YASMIM Y.; JIUSTI, JEANINI; ANTONIO, PATRICIA L.; CALDAS, LINDA V.E. Evaluation of the FTIR technique for the linearity assessment of commercial soda-lime glass irradiated with gamma radiation. In: INTERNATIONAL CONFERENCE ON DOSIMETRY AND ITS APPLICATIONS, 3rd, May 27-31, 2019, Lisboa, Portugal. Abstract... Lisboa, Portugal: C2TN, Instituto Superior Técnico, Universidade de Lisboa, 2019. Disponível em: http://repositorio.ipen.br/handle/123456789/31021. Acesso em: 30 Dec 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.