Gamma spectroscopic assay of soil samples from waste dump sites in Port Harcourt, Nigeria.
A lead shielded 7.6cmx7.6cm NaI (Tl) detector and a Canberra Multichannel Analyzer were employed for a gamma spectrometric assay of 100 soil samples from refuse dump sites in Port Harcourt city and environs. The massic activities of (40)K, (226)Ra and (228)Ra were determined and found to correspond to natural levels of some 10Bq/kg. No gamma-emitting anthropogenic radionuclides were detected. The mean radium equivalent is 44.2Bq/kg giving a dose rate of 24.6microSv/year.
Farai
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IP
Department of Physics, University of Ibadan, Ibadan, Nigeria. ip.farai@mail.ui.edu.ng
Okwunakwe
C E
CE
Makinde
O S
OS