Abstract

The concentrations of natural radionuclide of ²³⁸U and ²³²Th have been measured by neutron activation analysis technique in essential vegetables and soil samples collected from farms in Cameron Highlands and Penang, Malaysia. The concentrations of natural radionuclide in Tomato, Eggplant, Lattice, Pumpkin, Cucumber, Onion, Okra, and Chilli were measured. In soil, the average concentrations of ²³⁸U and ²³²Th were 203.832.05 Bq/kg and 186.173.35 Bq/kg, respectively in Cameron Highland. The highest concentrations of uranium and thorium were 6.251.58 Bq/kg and 2.51.55 Bq/kg in cucumber and lettuce products, respectively in the Cameron highlands. The transfer factors of these radionuclides from soil to vegetables were estimated. The highest estimation was in Cucumber and lettuce. These values were compared with the published data and were found to be within acceptable limits.

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