Table of Contents
ISRN Spectroscopy
Volume 2014, Article ID 245125, 8 pages
Research Article

Gamma Emitting Radionuclides in Soils from Selected Areas in Douala-Bassa Zone, Littoral Region of Cameroon

1National Radiation Protection Agency, P.O. Box 33732, Yaounde, Cameroon
2Department of Physics, Faculty of Science, University of Douala, P.O. Box 24157, Douala, Cameroon
3Department of Physics, Ibrahim Badamasi Babangida University, Lapai, Niger State, Nigeria
4Radioanalysis and Spectrometry Service, National Radiation and Protection Agency, Yaounde, Cameroon

Received 12 November 2013; Accepted 10 December 2013; Published 22 January 2014

Academic Editors: B. Liu and T. Stafilov

Copyright © 2014 Maurice Moyo Ndontchueng et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A study of natural radioactivity levels in some composites of eighteen soil samples selected within Douala-Bassa zone of Littoral Region has been evaluated. The samples were analysed using gamma spectrometry based broad energy germanium detector (BEGe 6350). The activity profile of radionuclide shows low activity across the studied areas. The obtained mean values of 226Ra, 232Th, and 40K in the two campuses were 25.48 Bq/kg, 65.96 Bq/kg, and 39.14 Bq/kg for Campus 1 and 24.50 Bq/kg, 66.71 Bq/kg, and 28.19 Bq/kg for Campus 2, respectively. In terms of health analysis, some radiation health hazard parameters were calculated within the two campuses. The mean values of radium equivalent activity were 122.81 Bq/kg and 122.08 Bq/kg, absorbed dose rate in air was 99.13 nGy/h and 98.18 nGy/y, annual outdoor effective dose was 0.12 mSv/y and 0.12 mSv/y, and external health hazard index was 0.34 and 0.33 in Campus 1 and Campus 2, respectively. These health hazard parameters were seen to be below the safe limit of UNSCEAR 2000 except the absorbed dose rate in air and the annual outdoor effective doses which are relatively high compared to the values of 60 nGy/h and 0.07 mSv/y. These results reveal no significant radiological health hazards for inhabitance within the study areas.