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cesium-137 (137Cs)

a radioactive material with a half-life of 30.2 years that is used in radiotherapy as a sealed source of gamma rays intended for application to various malignancies that are treated by brachytherapy. Cesium has replaced radium for such applications. See also brachytherapy.


a chemical element, atomic number 55, atomic weight 132.905, symbol Cs. See Table 6.

a product of atomic fission by explosion or breakdown of a reactor. It is feared as a pollutant because of its very long half-life.
References in periodicals archive ?
has been suggested that cesium-137 may move up the food chain and become
Particularly worrisome are the large amounts of cesium-137 in spent-fuel pools, because nearly all of this dangerous isotope would be released into the environment in a fire, according to the NRC.
The aim of the paper is using net soil erosion estimates obtained by cesium-137 technique (Di Stefano et al.
These experiments were unsuccessful, however, because only cesium-137 was available and it produced unpredictable radiation dosages.
White working at the Institute Belrad, Devoino had conducted more than 300,000 independent measurements of Cesium-137 contamination in food.
One billion curies of strontium-90 and cesium-137 have been injected so far, which, because of their half-life, would be expected to shrink to one curie in about 900 years.
McFarlane DJ, Loughran RJ, Campbell BL (1992) Soil erosion of agricultural land in Western Australia Estimated by Cesium-137.
Recently, Kochian, with colleagues Lasat and Ebbs, identified specific agronomic practices and plant species to remediate soils contaminated with radioactive cesium or cesium-137.
Reindeer meat in northern Norway was found to contain 500-2,500 becquerel (Bq) of cesium-137 per kilogram, it said.
When food is irradiated, it's passed through a chamber containing rods of radioactive cobalt-60 or cesium-137.