Self-attenuation factors in gamma-ray spectrometry of samples containing radionuclides of natural origin
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2018
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INTERNATIONAL SYMPOSIUM ON NATURALLY OCCURRING RADIOACTIVE MATERIAL, 8th
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High resolution gamma-ray spectrometry is currently the most widely used analytical technique for
qualitative and quantitative determination of radionuclides. Quantification of elements relies on the correct
analysis of the spectra, depending strongly on the efficiency calibration of the measurement apparatus, most often
performed with aqueous standard multi-radionuclide solutions. For efficiency calibration curves obtained by this
method and for samples containing radionuclides of natural origin such as sand, soil, rocks and wall paint with
apparent typical densities higher than that of water, self-attenuation correction factors were experimentally
determined for hundreds of different samples using the Cutshall transmission technique. The results show that, to
obtain more reliable analyses, correction factors for the self-attenuation behaviour, especially in the lower part of
the energy spectrum, should be used. Since attenuation depends not only on the density of the sample but also on
its chemical composition, correction factors have to be determined for each sample.
Como referenciar
PECEQUILO, B.R.S.; CAVALCANTE, F.; BARROS, L.F.; FERREIRA, A.O.; FONSECA, L.M.; MATEUS, C. Self-attenuation factors in gamma-ray spectrometry of samples containing radionuclides of natural origin. In: INTERNATIONAL SYMPOSIUM ON NATURALLY OCCURRING RADIOACTIVE MATERIAL, 8th, October 18-21, 2016, Rio de Janeiro, RJ. Proceedings... Vienna, Austria: IAEA, 2018. p. 461-465. (Proceedings Series IAEA). Disponível em: http://repositorio.ipen.br/handle/123456789/30144. Acesso em: 26 Feb 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.