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Radiation can be found in soils, in our air and water, and in us.
Because it occurs in our natural environment, we encounter it every day through the food we eat, the water we drink, and the air we breathe.
These elements have always been present in the Earth's crust and atmosphere, and are concentrated in some places, such as uranium orebodies which may be mined.
Naturally occurring radiation can be found all around us.
Most of the radiation dose we receive is from naturally occurring sources—most of this is from radon (discussed in the following part). The smallest dose we receive ( Radon is a colorless, odorless gas that can be found in the soil and rocks beneath homes, in well water, and in building materials.
C, or radiocarbon, is a radioactive isotope of carbon with an atomic nucleus containing 6 protons and 8 neutrons.
Concentrations of actual radionuclides may or may not have been increased; if they have, the term Technologically-Enhanced (TENORM) may be used.
Long-lived radioactive elements such as uranium, thorium and potassium and any of their decay products, such as radium and radon are examples of NORM.
The fraction of the radiation transmitted through the dead skin layer is estimated to be 0.11.
Markus Fiebig on behalf of SEQS The newly-renamed Section on European Quaternary Stratigraphy – previously the Subcommission on European Quaternary Stratigraphy (SEQS) – is a constituent body of the International Union of Quaternary Research (INQUA), Commission on Stratigraphy and Geochronology (SACCOM).