This sample, collected from Sibolga area of Northern Sumatra, was donated by the Indonesian Atomic Energy Commission. This material has been gamma-sterilized to ensure long-term stability of the material by inhibiting microbial action.

This material (top soil to a depth of 10 cm) was collected near Ebensee in Upper Austria at an altitude of 1100 m above sea level. The material was sieved through a 1 cm sieve, then heated at 450°C for 24 hours to destroy organic matter. This sample ha