Natural Radioactivity Content Of Granite Tiles Used In Greece

摘要

Measurements of ~(226)Ra, ~(232)Th and ~(40)K activity concentrations in commercial granite tiles imported in Greece were performed using gamma-ray spectrometry. The activity concentration of ~(226)Ra, ~(232)Th and ~(40)K ranged from 1 to 434, 2 to 239 and 71 to 1576 Bq kg~(-1), respectively. The calculated activity concentration index (I) values for all granite samples examined were found to be within the EC limit values for superficial and other materials with restricted use.