The Distribution of ²³⁹Pu in the Surface Soils at the Ujung Lemahabang Area

The study distribution of ²³⁹Pu in the surface soil at the Ujung Lemahabang Area has been carried out. The aim of study to get information about ²³⁹Pu activity in the depth of soil at 0 - 5 cm. 5 - 10 cm, 10 - 15 cm, 15 - 20 cm and 20 - 25 cm respectively. Sampling was done at random from 3 stations amount 1 kg respectively. The analytical method used was decomposition and leaching process using acid, chemical purification with anion exchange resin and measurement of activity with a spectrometry Result of the measurement showed that the average ²³⁹Pu activity was 10.16 mBq/kg and this method was very good because its have high recovery of separation about 80 %. The activity of ²³⁹Pu was lower than the result of measurement in another location in the world. The result of the study showed that the possibility of ²³⁹Pu came from natural and fallout from atmospheric nuclear tests in the last period 1950 - 1960. (author)