Self-attenuation factors in gamma-ray spectrometry of select sand samples from Camburi Beach, Vitória, Espírito Santo, Brazil

Evaluation of Self-Attenuation Coefficients of Oil-Produced Scales for Gamma-Ray Spectroscopic Analysis

“…At 122 keV, the correction factors were found to vary between 1.04 and 1.13 for scale samples with density of 1.4-1.8 g cm À3 . The values were lower than those reported by Barros [15] for sand samples with the same density, where the correction factors ranged between 1.24 and 1.93.…”

“…This approach employs additional assumptions and approximations that will increase the measurement uncertainty. A literature survey shows that most studies estimate the attenuation coefficients in soil and sediments semi-empirically using an experimental method [8,9,[14][15][16] or theoretically using Monte Carlo computation techniques. [17][18][19][20][21] To our knowledge, no efforts have been made to determine self-attenuation coefficients in scales generated from the petroleum industry.…”

Efficiency corrections in determining the 137Cs inventory of environmental soil samples by using relative measurement method and GEANT4 simulations

“…High resolution gamma-ray spectrometry is a simple and effective method to determine the radioactive activity of environmental soil samples (Barros and Pecequilo, 2014;Conti et al, 2013). The measuring system modelled and employed in this study was a coaxial P-type high-purity germanium detector based gamma spectrometer.…”

Avaliação da radioatividade natural em tintas de uso comercial no Brasil

“…Quando as amostras apresentam densidades maiores que a da solução padrão aquosa, faz-se necessário realizar uma correção na eficiência devido a autoatenuação de cada amostra, pelo fato da curva de eficiência ter sido feita com solução radioativa padrão aquosa (Barros e Pecequilo, 2014 Cutshall, 1983).…”