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cesium-137 |
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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. cesium a chemical element, atomic number 55, atomic weight 132.905, symbol Cs. See Table 6. cesium-137 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. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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