NATURAL RADIOACTIVITY AND ASSESSMENT OF HAZARD INDICES OF THE SOIL FOUND AT SUNG VALLEY, MEGHALAYA.

In this work, the variation of the radioactivity at different depth of the soil found at the Sung Valley in West Jaiñtia Hills District of Meghalaya in India is estimated by using the gamma-ray spectroscopy. The average activity concentration of 226Ra, 232Th and 40K for soil samples at different depths are measured to be 57, 156 and 352 Bq kg-1, respectively. The radiological hazard indices for the soil samples are calculated using standard models in order to determine the safe utility of these materials that are being used to manufacture domestic products by the locals. Values of all the radiological hazard indices are observed to be within the internationally recommended values as proposed by the European Commission and the United Nations Scientific Committee on the Effects of Atomic Radiation. The present study ensures that the soil analysed presents a negligible radiation hazard, and produced poetries and artefacts radiological incidence will stay within the allowed natural limit.