2009
DOI: 10.1590/s0102-261x2009000300003
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Dose de exposição radiométrica de granitos do estado de Rondônia, Brasil

Abstract: ABSTRACT. This work evaluated the activity concentration of the radioelements K, eU and eTh in samples of granites from Rondônia State, Brazil. The statistical analysis of the data indicated that they fit lognormal distributions. The modal values correspond to about 11% for K, 29 ppm for eU and 85 ppm for eTh. Direct significant correlations were found among the concentrations of the three radioelements, i.e. r = 0.71 (between K and eU), r = 0.72 (between K and eTh), and r = 0.72 (between eU and eTh), suggesti… Show more

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