Measurement of226Ra,232Th, 137Csand 40k activities of Wheat and Corn Products in Ham Province - Iran and Resultant Annual Ingestion Radiation Dose

摘要

Humans and other organisms in their environment are under continuous radiation of natural radioactive material found in earth's crust and cosmic rays. In addition, they receive the radiation of medical and industrial sources. The most important natural radionuclides are 226Ra 40K ,232Th which with the different physical and chemical properties enter into the physical and biological environments (1)226Ra with half-life ,1620 (y) belong to 238U chain is one of the main pollutants in the natural radiation environment and there is widely in different ecosystems.