Assessment of gamma-ray emissions from natural and manmade decorative stones
- First Online:
Decorative stones (32 natural and 18 manufactured) and five ceramic tiles that are used in home interiors were measured with gamma-ray spectrometry, to identify and quantify the naturally occurring radionuclides. Activity concentrations of the radioisotopes varied by more than two orders of magnitude across the stone samples, with maximal levels of 3380, 850, and 2130 Bq/kg, for 238U, 232Th, and 40K, respectively. A radiation index and measurements with a radiation meter established that the annual effective dose rates due to a 1 h/day exposure to gamma rays emitted by the granite samples were often low, but can occur as high as 1 mSv/year.
KeywordsRadon Granite Gamma-ray Emanation
- 3.Steck D. http://www.solidsurfacealliance.org/files/Radon_Results.htm. Accessed Feb 2009
- 5.United Nations Scientific Committee on the Effects of Atomic Radiation (1993) Sources and effects of ionizing radiation. United Nations, New YorkGoogle Scholar
- 6.European Commission, Directorate-General, Environment, Nuclear Safety and Civil Protection (1999) Radiological protection principles concerning the natural radioactivity of building materials. Radiation Protection 112, p 8Google Scholar
- 8.Berkeley Nucleonics Corp. (2009) Instruction Manual, Model 907–palmRad, p 17Google Scholar