caesium-137
Noun
Meaning
caesium-137 (uncountable)
A radioactive isotope of caesium, 55Cr, having 55 protons and 82 neutrons and which is formed mainly as a fission product by nuclear fission.
Examples
An incident where water-soluble caesium-137 leaked into the source storage pool requiring NRC intervention citation has led to near elimination of this radioisotope outside of military applications.
As a daughter product of fission bomb testing from the 1950s through the mid-1980s, caesium-137 was released into the atmosphere, where it was absorbed readily into solution.
The radioactive isotope caesium-137 has a half-life of about 30 years and is used in medical applications, industrial gauges, and hydrology.
The caesium-137 chloride radioactive source is the blue square, and gamma rays are represented by the beam emerging from the aperture.
This was the radiation source involved in the Goiânia accident, containing about 93 grams of caesium-137 chloride.