Ramli, Ahmad Termizi and Apriantoro, Nursama Heru and Wagiran, Husin (2009) Assessment of radiation dose in the high terrestrial gamma radiation area of Selama District, Perak Malaysia. Applied Physics Research, 1 (2). pp. 45-52. ISSN 1916-9647 (online) ; 1916-9639 (print)
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Official URL: http://www.ccsenet.org/journal/index.php/apr/artic...
Survey of terrestrial gamma radiation (TGR) dose rates have been conducted in Selama district, Perak, Malaysia. The mean value of TGR dose rate outdoor in Selama is (273 ± 133) nGy h-1. For the habited land, the mean TGR dose rates outdoor and indoor are (205 ± 59) nGy h-1 and (212± 64) nGy h-1 respectively. They contribute fatal cancer risk of 6.4 x 10-5 per year to an individual in the area. The activity concentrations of 238U, 232Th, and 40K in the soil samples were analysed using a high resolution co-axial HPGe gamma ray spectrometer system. The values obtained range from 57 Bq kg-1 to 364 Bq kg-1 with the mean value of (178±95) Bq kg-1 for 238U; 207 Bq kg-1 to 625 Bq kg-1 with the mean value of (353±143) Bq kg-1 for 232Th, and 26 Bq kg-1 to 601 Bq kg-1 with the mean values of (273±133) Bq kg-1 for 40K.
|Uncontrolled Keywords:||TGR dose rate, 238U, 232Th, 40K, radiation risk|
|Subjects:||Q Science > QC Physics|
Q Science > QD Chemistry
|Deposited By:||Siti Anisa Abdul Hamid|
|Deposited On:||14 Jan 2011 01:08|
|Last Modified:||17 Jan 2011 09:30|
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