cesium 137

noun

Chemistry.

1. the radioactive cesium isotope with mass number 137 and a half-life of 33 years: used for gamma irradiation of certain foods and for radiation therapy.

Example Sentences

In a reactor, many of the uranium 235 nuclei split apart, transforming into radioactive isotopes such as iodine 131 and cesium 137.

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Greenpeace, the conservation group, issued a statement saying the presence of these isotopes suggested cesium 137 was also released.

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Independent newspaper Novaya Gazeta reported traces of cesium 137 were detected in the emergency room area an hour after the patients were brought in, forcing the area to be decontaminated.

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An hour later, traces of cesium 137 were detected in the ER, which then had to be decontaminated.

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Evacuations continued for months as Japan struggled to find housing for a large population exposed to radioactive iodine 131, cesium 134 and cesium 137.

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