Cs Activity Concentration In Soil From Tea Plantantion Areas In Cameron Highlands

137Cs is well known man-made radionuclide produced from nuclear industry. Nuclear weapon tests and nuclear accidents had contributed to presence of 137Cs into the worldwide environment including Malaysia. It has spread out to the entire world through the air and water current. Since Cameron Highlands is located at high altitude, there is a better chance of the 137Cs to settle down on the trees and later the soil underneath. In this study, the soil samples were taken at the slopes of two different tea plantation areas namely A and B. The soil samples were oven dried, ground, sieved and packed and sealed properly in plastic containers before measurement. Each plastic container contains around 450 g of sample. The measurement of 137Cs activity concentration was done using HPGe detector gamma spectrometer. The spectrum was analyzed using Gamma Vision software to calculate the activity concentration of 137Cs with energy peak of 661.66 keV. The activity concentration of 137Cs found in the samples ranged from 0.23 to 1.90 and 0.11 to 3.01 Bq/kg for tea plantation A and tea plantation B, respectively. From the activity concentration of 137Cs result, it was comparable to the others research regarding to 137Cs in the soil around Asian. ABSTRAK 137Cs dikenali sebagai radionuklid buatan manusia hasil dari industri nuklear. Senjata nuklear dan kemalangan nuklear telah menyumbang kepada peningkatan jumlah 137Cs ke persekitaran di seluruh dunia termasuk persekitaran Malaysia. Ia telah merebak ke seluruh dunia melalui arus udara dan air. Disebabka