Comparative evaluation for barite mortar attenuation using iso radioprotection qualities
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2015
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ENCONTRO NACIONAL DE FÍSICA DA MATÉRIA CONDENSADA, 38.
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Resumo
The barite mortar, which is composed of cement, sand, water, barium sulphate, have been used widely in
radiology facilities as shielding material for radiation protection purposes, as they present some advantages
such as: high e±ciency as attenuation materials, easy to handle application, easy availability in the domestic
market and low cost. However, in practice the dimensioning of the mortar and the barite concrete used in
plastering and construction of walls, respectively, is determined by the principle of equivalence of thickness in
relation to lead or concrete. This procedure results in a overestimated dimensioning, given the possibility of
occurrence of well signi¯cant errors, in function of the di®erence of speci¯c density between lead or concrete
and the barite The main aim of this work is to characterize the barite mortars found in di®erent regions of
Brazil by measuring photons transmission. Plates of di®erent thickness were fabricated by the manufacturer
to test this research in the laboratory. The plates were irradiated with ISO X-ray beams (N60, N80, N110
and N150), generated by Pantak HF320 X-ray equipment, at the IPEN/CNEN laboratories and CRCN/CNEN,
using X-ray spectrometry as well as measures of ionization chamber. It was also determined the HVL and the
mean energy in this energy range. Results obtained in this work point out the importance of the knowledge
of the X-ray spectra for accurate determination of ambient dose equivalent and e®ective dose values. The
photons transmission is one of the used parameters for calculate the shielding material thickness. The authors
are thankful to FUNDACENTRO, CNPq and IPEN. This work was supported by FAPEMIG and Ministry of
Science and Technology - MCT/Brazil, through the Brazilian Institute of Science and Technology (INCT) for
Radiation Metrology in Medicine
Como referenciar
ALMEIDA JUNIOR, A.T. de; NOGUEIRA, M.S.; SANTOS, M.A.P.; POTIENS, M.P.A.; CAMPOS, L.L. Comparative evaluation for barite mortar attenuation using iso radioprotection qualities. In: ENCONTRO NACIONAL DE FÍSICA DA MATÉRIA CONDENSADA, 38., 24-28 de maio, 2015, Foz do Iguaçu, PR. Resumo... Disponível em: http://repositorio.ipen.br/handle/123456789/27022. 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.