![]() ![]() Cs-137 has a half-life of about 30 years. One of the biggest contaminations of Cs-137 happened during the Chernobyl accident of 1986, when about 27 kg of the metal entered the atmosphere. 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. (A more common example is mercury.) Cs-137 is most commonly produced as a byproduct in fission reactions of uranium and plutonium in nuclear plants or nuclear explosions. 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. ![]() Silvery white, soft, and malleable, Cs-137 is one of the very few metals that exist in liquid form at room temperature. However, the container was found intact, and the isotope safe.Ĭaesium-137 (atomic mass 137) is a heavier, radioactive isotope of Caesium (Cs) whose most stable form is Cs-133. The mysterious disappearance of the 1 ft × 1 ft box had triggered concern and some panic, as both police and ONGC officials searched frantically for it. Radioactive isotopes are also likely to be used by US forces in. They can also be defined as atoms that contain an unstable combination of neutrons and protons, or excess energy in their nucleus. Radioisotopes are radioactive isotopes of an element. A small container of radioactive Caesium-137, which went missing on January 16 from a truck ferrying machinery and tools from an ONGC exploration site near Machilipatnam to Rajahmundry 120 km away, was retrieved from a scrap shop at Kalindindi village in Krishna district of Andhra Pradesh late Wednesday evening. typically caesium-137, chlorine-36, cobalt-60, iodine-131, plutonium and strontium-90. Cesium, also spelled caesium, was discovered in 1860 by Robert Bunsen and Gustav Kirchhoff. Mit einer Halbwertszeit von 30,17 Jahren zerfällt Cäsium-137 unter beta-Strahlung zu 94,6 in Barium-137m, das wiederum mit einer Halbwertszeit von 2,55 Minuten in das stabile Barium-Isotop Barium-137 zerstrahlt und für die Aussendung von Gammastrahlen verantwortlich ist das restliche Cäsium-137 zerfällt direkt zu 137 Ba. Different isotopes of the same element have the same number of protons in their atomic nuclei but differing numbers of neutrons. ![]()
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