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Table 3 Natural radionuclides in soil and the corresponding absorbed dose rate in air 1 m above ground

From: Determination of 226Ra, 232Th, 40K, 235U and 238U activity concentration and public dose assessment in soil samples from bauxite core deposits in Western Cameroon

Nuclide

World average (UNSCEAR 2008)

Fongo-Tongo (study area)

Concentration (Bq kg−1)

Dose rate (nGy h−1)

Concentration (Bq kg−1)

Dose rate (nGy h−1)

% contribution

226Ra

33

25

124.85

28.58

15.40

232Th

45

45

157.27

53.31

28.33

40K

420

30

670.92

104.11

55.32

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