Publisher: Bachudo Science Co. Ltd

Dose Assessment Due To Terrestrial Gamma Radiation In Ibadan, South Western Nigeria

A. M. Arogunjo, I. P. Farai
KEYWORDS: soil; dose; effective; rollective; 40K; 238U; 232Th; exposure

ABSTRACT:

The activities of primordial radionuclides in · surface soil at Ibadan, South-Western Nigeria have been measured with a 7.6cm x 7.6cm Nal(TL) detector. The mean absorbed dose rate, annual effective dose and the collective effective dose at Ibadan were evaluated from measurement of 40K; 232Th activities and their mean values found to be 0.070 ± 0.008 µGy.h.;, 86.1 μSV.y-1 and 344.2 man Sv.y-1, respectively. 


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