![]() Cs-137 has a half-life of about 30 years. The 32 KeV x-ray peak and the 662 keV gamma peak are very obvious, and as there is a good spread between the peaks, this source makes for a good calibration source. ![]() 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. This spectrum was taken from a 1 C 137Cs check source, using a GS-1100-PRO with a new 2 x 2' Gammaspectacular detector and PRA software. (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. Caesium-137, with a half-life of 30.17 years, is one of the two principal medium-lived fission products, along with 90 Sr, which are responsible for most of the radioactivity of spent nuclear fuel after several years of cooling, up to several hundred years after use. Silvery white, soft, and malleable, Cs-137 is one of the very few metals that exist in liquid form at room temperature. The amounts of radiation from fallout caesium-137 in the bodies of a number of people in a heavily populated region have been measured and an estimate made. 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 responses of eight hand-held instruments to 137Cs internal contamination in people. 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. ![]() 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. ![]()
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