Radioactivity and Radon potential of the terra rossa soil

摘要: In the Slovenian and Croatian karstic region, four locations of terra rossa soil were selected, in which samples analysed by gamma spectrometry, radon activity concentration (sum 222Rn 220Rn) measured gas at points within a regular 24m×24m grid. Levels (Bq kg− 1) naturally occurring radionuclides obtained upper 15 cm layer were: 320– 510 for 40K, 50– 85 228Ra, 52– 75 226Ra 70 238U. Measurement sites found to lie beyond impact nearby coal-fired power plant. Man-made 137Cs was levels from 10 25 Bq 1 sea shore 105– 250 inland locations. Although uranium/radium contents different equal experimental error, differed substantially point point, could range 420 kBqm− 3 dry 0.1 2.7 wet soil.