Measurement of natural radioactivity in phosphogypsum by high resolution gamma ray spectrometry
NATO Advanced Research Workshop on Radiation Safety Problems in the Caspian Region, Baku, Azerbaijan, 11 - 14 September 2003, vol.41, pp.197-204, (Full Text)
- Publication Type: Conference Paper / Full Text
- Volume: 41
- City: Baku
- Country: Azerbaijan
- Page Numbers: pp.197-204
- Keywords: radioactivity, exposure, food, fertilizer, phosphoric acid, radon
- Ankara University Affiliated: No
Abstract
Phosphatic fertilizers are manufactured from phosphate ores which contain naturally occurring radionuclides such as U-238 and its daughter products. Large amounts of phosphogypsum. is obtained and has Ra-226. The natural radioactivity was measured by a gamma ray spectrometer. The activity concentration Ra-226 was 465 Bq/kg as a mean value. The natural external gamma radiation dose rate is estimated to be 205 nGy/h at 1 m above ground level when 1-1.5 kg of phosphogypsum is applied in 1 m(2) surface area of field.