Mietelski, Jerzy WojciechTomankiewicz, EwaGrabowska, Sylwia2018-01-122018-01-122005http://rifj.ifj.edu.pl/handle/item/180Presented are results of natural activity concentration in rock salt of Siroszowice mine. Measurements were done by means of low background gamma spectrometry and alpha spectrometry preceded by radiochemical procedure. The method of radiochemical analyses is presented in details. The activity of 40K was found to be 2.1±0.3 Bq/kg, 238U range from 0.10±0.02 Bq/kg to 0.40±0.06 Bq/kg and that for 232Th range from 0.03±0.02 Bq/kg to 0.11±0.02 Bq/kg. It seem that the other radionuclides from series U and Th are most likely in equilibrium with their parents. Obtained results suggest a very low external dose rate within the mine.polReport