Evaluation of high-linearity bone radiation detectors exposed to gamma-rays via FTIR measurements

Autor(es)

de Oliveira, Lucas Nonato ^{[1, 2]} ; do Nascimento, Eriberto Oliveira ^[1] ; Morais Junior, Pedro de Aquino ^[1] ; Antonio, Patricia de Lara ^[2] ; Caldas, Linda V. E. ^[2]

Afiliação do(s) autor(es)

^[1] Inst Fed Educ Ciencia & Tecnol Goias IFG, Rua 75 46, BR-74055110 Goiania, Go - Brazil

^[2] Cornissao Nacl Energia Nucl IPEN CNEN, Inst Pesquisas Energet & Nucl, Av Prof Lineu Prestes2242, BR-05508000 Sao Paulo, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Applied Radiation and Isotopes; v. 170, APR 2021.
• Citações Web of Science: 0

Resumo

In radiation physics, the study of new alternative dosimeters is of interest to the growing branch of dosimetric characterization for radiotherapy applications. The goal of this work was to expose bone samples to high doses and evaluate their linearity response to gamma rays. The Fourier Transform Infrared (FTIR) spectrophotometry technique was employed as the evaluation technique, and based on the spectrophotometry absorbance profiles the linearity was assessed based on the following methods: Area Under the Curve (AUC), Wavenumber Method (WM), Partial Component Regression (PCR) and Partial Least-Square Regression (PLSR) methods. The bone samples were irradiated with absorbed doses of 10 Gy up to 500 Gy using a Co-60 Gamma Cell-220 system. The results showed, for the calibration curves of the system, adequate linearity on all methods. In conclusion, the results indicate a good linear response and therefore an interesting potential radiation detector. (AU)

• Processo FAPESP: 18/05982-0 - P&D&I em metrologia das radiações na área da saúde
• Beneficiário: Linda Viola Ehlin Caldas
• Modalidade de apoio: Auxílio à Pesquisa - Temático