Development of ceramic materials based on rare earth doped yttria for application in radiation dosimetry

• Grant number: 14/23621-3
• Support type: Scholarships in Brazil - Post-Doctorate
• Effective date (Start): August 01, 2015
• Effective date (End): July 31, 2018
• Field of knowledge: Engineering - Nuclear Engineering - Applications of Radioisotopes
• Cooperation agreement: Coordination of Improvement of Higher Education Personnel (CAPES)
• Principal researcher: Leticia Lucente Campos Rodrigues
• Grantee: Silas Cardoso dos Santos
• Home Institution: Instituto de Pesquisas Energéticas e Nucleares (IPEN). Secretaria de Desenvolvimento Econômico (São Paulo - Estado). São Paulo , SP, Brazil
• Associated research grant: 10/16437-0 - Characterization and applications of dosimetric materials using optically stimulated luminescence and complementary techniques, AP.TEM

Abstract

The use of rare earths (TR) as dopant of materials has supplied the development of advance materials for many applications such as optical markers, special alloys, semiconductors, as well as radiation dosimetry. The doped rare earth calcium sulfate (CaSO4:TR) is the most studied, and CaSO4:Dy is used as thermoluminescent dosimeters for radiation dosimetry of beta, gama, X, electron, clinic photons and UV radiation and laser. It shows excellent reproducibility, high sensitivity, paramagnetic (RPE) and spectrometric proprieties (AO). To develop dosimetric materials is a great challenge in innovation of materials. Doped rare earth yttria (Y2O3:TR) presents luminescent proprieties and can be considered a potential material for dosimetry. This project aims to develop a ceramic material which shows luminescent dosimetric proprieties, being stimulated by optical or thermal radiation (OSL/TL), spectrophotometric (AO), or paramagnetic (RPE) for radiation dosimetry. The challenge of this propose is to determine the best composition of Y2O3:TR to obtain a nano structure material with adequate response for application in dosimetry. Thus, it is important to plan the compositions, to evaluate the dopant effect on dosimetry characteristics, to study the stability and rheology of Y2O3:TR suspensions and to adequate them for conformation by replica method, using vegetable fibers as template to produce dosimeters. (AU)

Scientific publications

(6)

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

SANTOS, S. C.; RODRIGUES JR, O.; CAMPOS, L. L. EPR response of yttria micro rods activated by europium. Journal of Alloys and Compounds, v. 764, p. 136-141, OCT 5 2018. Web of Science Citations: 1.

SANTOS, S. C.; RODRIGUES, JR., O.; CAMPOS, L. L. EPR dosimetry of yttria micro rods. Journal of Alloys and Compounds, v. 742, p. 263-270, APR 25 2018. Web of Science Citations: 2.

SANTOS, S. C.; RODRIGUES, JR., O.; CAMPOS, L. L. Bio-prototyping of europium-yttria based rods for radiation dosimetry. Materials Chemistry and Physics, v. 199, p. 557-566, SEP 15 2017. Web of Science Citations: 3.

SANTOS, S. C.; YAMAGATA, C.; CAMPOS, L. L.; MELLO-CASTANHO, S. R. H. Processing, microstructure and thermoluminescence response of biomorphic yttrium oxide ceramics. CERAMICS INTERNATIONAL, v. 42, n. 11, p. 13291-13295, AUG 15 2016. Web of Science Citations: 7.

SANTOS, S. C.; YAMAGATA, C.; CAMPOS, L. L.; MELLO-CASTANHO, S. R. H. Processing and thermoluminescent response of porous biomorphic dysprosium doped yttrium disilicate burner. Materials Chemistry and Physics, v. 177, p. 505-511, JUL 1 2016. Web of Science Citations: 4.

SANTOS, S. C.; YAMAGATA, C.; CAMPOS, L. L.; MELLO-CASTANHO, S. R. H. Bio-prototyping and thermoluminescence response of cellular rare earth ceramics. Journal of the European Ceramic Society, v. 36, n. 3, p. 791-796, FEB 2016. Web of Science Citations: 6.