Half-life: 30,16 years
Main emission lines: 32keV, 662keV
Cesium-137 is produced mainly by nuclear fission in nuclear reactors and nuclear weapons. It is the main radioactive contaminant. It accumulates particularly well in mushrooms and berries. Foods high in cesium are highly discouraged to consume. RadiaCode-101 can measure the activity of this nuclide in food and soil. There is a separate mode in the application for this purpose. Cs-137 is often the basis for test sources. It was also previously used in some radiolamps and flaw detectors.