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|Title: ||Natural radioactivity in Udupi and Karkala Taluks of coastal Karnataka|
|Authors: ||Pinto, Gerald|
Somashekarappa, H M
Gamma radiation levels
|Issue Date: ||Jul-2010|
The gamma radiation
levels, 226Ra, 232Th and 40K concentrations in
soils of Udupi and Karkala Taluks of coastal Karnataka region of India have been studied in the present paper.
The gamma absorbed dose rates were measured using portable GM survey meter. The
soil radioactivity was measured by gamma spectrometry method using an HPGe
detector. The results show that the 226Ra concentration varies in
the range 2.6-78.0 Bq kg-1 with a mean of 34.4 Bq kg-1, 232Th in the range 2.3-166.2
Bq kg-1 with a
mean of 45.3 Bq kg-1 and 40K in the range 72.9-493.5 Bq
kg-1 with a
mean of 198.6 Bq kg-1 in the 0-5 cm soil profile. The gamma absorbed dose rates, measured
using the GM survey meter, show that the dose varies in the range 70.0-123.0
nGy h-1. The regression analyses performed between the measured dose rates
and that calculated from the primordial radionuclide activities show a poor
correlation between the measured and calculated dose.
|ISSN: ||0975-1041 (Online); 0019-5596 (Print)|
|Appears in Collections:||IJPAP Vol.48(07) [July 2010]|
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