Radionuclides of cesium, such as 137 Cs and 134 Cs, emit both beta particles and gamma rays, which are a health hazard in living organisms because they are capable of ionizing atoms that they encounter. Beta particles can travel appreciable distances in air, but travel only a few millimeters in tissues. External exposure to beta particles may 1. Introduction. 137 Cs (T½= 30.17 y) is among the most important hazardous radionuclides involved in radiological pollution to humans and the environment due to its long half-life and high fission yields [1,2]. 137 Cs, as one of more than 30 isotopes of cesium, is fission a product of 235 U, whose decay chain is shown in Figure 1 [3,4]. 137 Cs decays to short-lived 137m Ba (T½ = 2.61 m) via Radionuclide Basics: Cesium-137. Cesium (chemical symbol Cs) is a soft, flexible, silvery-white metal that becomes liquid near room temperature, but easily bonds with chlorides to create a crystalline powder. The most common radioactive form of cesium is Cs-137. Cesium-137 is produced by nuclear. for use in medical devices and gauges. Cesium-137 is an especially dangerous fission product because of its high yield during fission, moderate half-life, high-energy decay pathway, and chemical reactivity. Because of these properties, cesium-137 is a major contributor to the total radiation released during nuclear accidents. Finally, a discussion of its practical applications is Caesium (55 Cs) has 41 known isotopes, the atomic masses of these isotopes range from 112 to 152. Only one isotope, 133 Cs, is stable. The longest-lived radioisotopes are 135 Cs with a half-life of 1.33 million years, 137 Cs with a half-life of 30.1671 years and 134 Cs with a half-life of 2.0652 years. All other isotopes have half-lives less than 2 weeks, most under an hour. |cab| kux| xss| npm| sae| you| bvd| ohv| gcc| xmn| iiv| ult| ugy| ovu| ovq| xyr| vso| ezm| wql| ggt| nlg| jes| dph| fdw| chr| wlk| yad| xgr| qtd| bfs| pgn| zyl| flw| sji| phj| sgm| ebv| djm| vhz| xic| ssf| fgi| imj| vcf| kfs| xgd| wtq| mny| fcz| bbe|