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- Title
RADON EXHALATION RATE FROM THE SOIL, SAND AND BRICK SAMPLES COLLECTED FROM NWFP AND FATA, PAKISTAN.
- Authors
Rahman, Said; Mati, N.; Matiullah; Ghauri, Badar
- Abstract
In order to characterise the building materials as an indoor radon source, knowledge of the radon exhalation rate from these materials is very important. In this regard, soil, sand and brick samples were collected from different places of the North West Frontier Province (NWFP) and Federally Administered Tribal Areas (FATA), Pakistan. The samples were processed and placed in plastic containers. NRPB radon dosemeters were installed in it at heights of 25 cm above the surface of the samples and containers were then hermetically sealed. After 40-80 d of exposure to radon, CR-39 detectors were removed from the dosemeter holders and etched in 25% NaOH at 80°C for 16 h. From the measured radon concentration values, 222Rn exhalation rates were determined. Exhalation rate form soil, sand and brick samples was found to vary from 114 ± 11 to 416 ± 9 mBq m-2 h-1, 205 ± 16 to 291 ± 13 mBq m-2 h-1 and 245 ± 12 to 365 ± 11 mBq m-2 h-1, respectively.
- Subjects
PAKISTAN; RADON mitigation; RADIATION exposure; RADIOLOGICAL research; RADON isotopes; BUILDING material permeability
- Publication
Radiation Protection Dosimetry, 2007, Vol 124, Issue 4, p392
- ISSN
0144-8420
- Publication type
Article
- DOI
10.1093/rpd/ncm226