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Radiation Protection Dosimetry Advance Access originally published online on May 25, 2007
Radiation Protection Dosimetry 2008 128(2):206-212; doi:10.1093/rpd/ncm310
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© The Author 2007. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

Measurement of natural radioactivity and dose rate assessment of terrestrial gamma radiation in the soil of southern Punjab, Pakistan

I. Fatima1, J. H. Zaidi1,*, M. Arif1, M. Daud1, S. A. Ahmad2 and S. N. A. Tahir3

1 Nuclear Chemistry Division, PINSTECH, PO Nilore, Islamabad, Pakistan
2 Directorate of Safety, Pakistan Atomic Energy Commission, PO Box 3416, Islamabad, Pakistan
3 Directorate General of Local Government and Community Development Department, Punjab, Lahore, Pakistan

* Corresponding author: jamshed{at}pinstech.org.pk

Received February 23, 2007, amended April 17, 2007, accepted April 23, 2007

Activity concentrations of 226Ra, 232Th, 40K and 137Cs in soil samples collected from the most populous area of southern Punjab of Pakistan have been measured by gamma-ray spectrometry. The measured activity concentrations for these radionuclides are compared with the reported data from different other countries and it is found that measured activity concentrations are comparable with the worldwide measured average values reported by the UNSCEAR. Subsequently assessed radiological effects show that the mean radium equivalent activity (Raeq) is 96.7 ± 15.2 Bq kg–1 and air absorbed dose rate (D) is 46.1 ± 7.3 nGy h–1. The values of internal and external radiation hazard indices are found to be less than unity. The annual effective radiation dose is calculated to be 0.28 ± 0.05 mSv, which is well below the limit of 1.0 mSv y–1 recommended by the International Commission on Radiological Protection, for the general public.


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Home page
 Radiat Prot DosimetryHome page
S. N. A. Tahir, A. S. Alaamer, and R. M. Omer
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[Abstract] [Full Text] [PDF]


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