Detection of 40K
Application of radiation detectors: the gamma-ray signature of the ubiquitous, naturally-occurring and primordial radionuclide 40K (Potassium 40).
Its is by means of radiation detection gamma-ray spectroscopy that the presence of 40K can be globally
assesses detected almost
everywhere on earth, not only in soils (rocks, sediments etc.) and waters (lakes, oceans etc.)
but as well in plants, animals and humans.
Because of normal biological processes, the number of radioactive decays of 40K in an adult person are of the order of 4 thousands per second, i.e. 4 kBq in radiation unit.
There are cases when gamma-ray detection of radioactive materials and or radioactive contaminations must deal with the interfering presence of 40K.