Skip Navigation


Radiation Protection Dosimetry Advance Access originally published online on February 18, 2008
Radiation Protection Dosimetry 2008 130(2):206-212; doi:10.1093/rpd/ncm497
This Article
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow All Versions of this Article:
130/2/206    most recent
ncm497v1
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Add to My Personal Archive
Right arrow Download to citation manager
Right arrowRequest Permissions
Google Scholar
Right arrow Articles by Mujahid, S. A.
Right arrow Articles by Farooq, M.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Mujahid, S. A.
Right arrow Articles by Farooq, M.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

© The Author 2008. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

Measurements of natural radioactivity and radon exhalation rates from different brands of cement used in Pakistan

S. A. Mujahid1,*, A. Rahim1, S. Hussain1 and M. Farooq2

1 Environmental Radiation Laboratory, Physics Division, PINSTECH, P.O. Nilore, Islamabad, Pakistan
2 Isotopes Application Division, PINSTECH, P.O. Nilore, Islamabad, Pakistan

* Corresponding author: shafiq_mujahid{at}hotmail.com

Received July 16, 2007, amended October 29, 2007, accepted December 12, 2007

The measurement of activity due to the naturally occurring radionuclide has been carried out in different brands of cement available in Pakistan. The gamma spectra of the collected samples were obtained using high-purity germanium detector and analysed for the presence of 232Th, 238U and 40K. The assessment of radiological hazards due to these radionuclides has also been made. The studies concerning the determination of radon-exhalation rates from these samples of cement were also carried out using CR-39 based NRPB radon dosimeters. The range of activity concentrations were found for 226Ra (from 25.10 ± 1.55 to 52.60 ± 3.20 Bq kg–1), 232Th (from 10.30 ± 0.65 to 30.40 ± 1.70 Bq kg–1) and 40K (from 17.25 ± 1.55 to 292.95 ± 23.05 Bq kg–1). The estimated value of radium equivalent concentration was from 11.16 ± 2.60 to 114.98 ± 7.11 Bq kg–1. The calculated absorbed dose rate in air and the annual effective dose were in the range from 18.54 ± 1.17 to 52.90 ± 3.31 nGy h–1 and 0.09 ± 0.01 to 0.26 ± 0.02 mSv, respectively. The external and internal hazard indices were in the range from 0.11 ± 0.01 to 0.31 ± 0.02 and 0.18 ± 0.01 to 0.45 ± 0.03, respectively. The radon exhalation rates from different brands of cement were found in the range from 3.3 ± 0.7 to 8.1 ± 1.7 mBq kg–1 h–1.


Add to CiteULike CiteULike   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us    What's this?




Disclaimer: Please note that abstracts for content published before 1996 were created through digital scanning and may therefore not exactly replicate the text of the original print issues. All efforts have been made to ensure accuracy, but the Publisher will not be held responsible for any remaining inaccuracies. If you require any further clarification, please contact our Customer Services Department.