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Radiation Protection Dosimetry 2005 114(4):527-532; doi:10.1093/rpd/nch471
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© The Author 2005. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oupjournals.org

Radioactivity in building materials used in and around Dhaka city

S. Roy1,*, M. S. Alam2,3, M. Begum1 and B. Alam2

1 Health Physics Division, Atomic Energy Centre, P.O. Box No. 164, Dhaka-1000, Bangladesh
2 Department of Physics, University of Dhaka, Dhaka-1000, Bangladesh
3 Physikalisches Institut III, Universitact Erlangen-Nuernberg, Erwin-Rommel Strasse 1, D-91058 Erlangen, Germany

* Corresponding author: sroy55{at}yahoo.com

Received October 15, 2004, amended January 27, 2005, accepted February 7, 2005

The activity levels of 226Ra, 232Th and 40K were determined using gamma-ray spectroscopy in different commercial brands of cement, sand and hollow concrete bricks, which were collected from the building material suppliers of Dhaka City. The activity concentrations in the samples were found to be somewhat higher than in other countries. An effort has been made to assess the radiation hazard associated with these materials by determining the gamma activity concentration index I. It was found that the value of I for all the samples was ≤2, which indicates that the gamma dose contribution was not more than 0.3 mSv y–1. The samples considered were safe for use in the construction of urban dwellings in Bangladesh and do not pose any significant source of radiation hazard.


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