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Cálculo de Atividade de 1g de 226 Ra<br />
A = λ . N = (ln 2 / t ½ ) x (1 x 6,02 x10 23 / 226)<br />
A MEIA VIDA DO Ra-226 é 1600 anos =<br />
1600 x 365 x 24 x 60 x 60 = 5,04576 x 10 10 s<br />
ENTÃO<br />
A =[ 0,693/ 5,04576x 10 10 ] x [6,02 x 10 23 / 226]<br />
A = 3,67 x 10 10<br />
Observe que 1 Ci = 3,7 x 10 10 Bq
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