F.B.  Sigalo, M.A. Briggs-  Kamara, 
    Industrial Ionising Radiation Activity: A Case Study of Western Geophysical Industry in Port Harcourt, Nigeria,
    Research Journal of Applied Sciences,
    Volume 5,Issue 2,
    2010,
    Pages 112-114,
    ISSN 1815-932x,
    rjasci.2010.112.114,
    (https://makhillpublications.co/view-article.php?doi=rjasci.2010.112.114)
    Abstract: In this study, the measurement of industrial ionizing radiation background was reported in Port Harcourt, Nigeria taking the western Geophysical Industry as a case study. The Geiger Muller Counter and its associated sensors were used to obtain counts of radiation at intervals of 10 min for about 1 h at each site. Count rates for the three chosen locations were 26.98&plusmn;0.64, 37.19&plusmn;1.06 and 35.40&plusmn;1.95 cpm, respectively. The corresponding dose rates were 8.42&plusmn;0.34, 11.60&plusmn;0.28 and 11.04&plusmn;0.30 &#956;Rh<SUP>-1</SUP>. These values were found to be below the maximum permissible rate of 57 &#956;Rh<SUP>-1</SUP> accepted internationally by the National Council on Radiation Protection (NCRP).
    Keywords: Ionising radiation;background radiation;environmental radiation;absorbed dose;dose rate;radioactivity