Homonym: cesium-137 (Radioisotope)
Cesium-137 is a radioactive isotope of the element cesium, which is produced during nuclear fission processes, such as those occurring in nuclear reactors and atomic bombs. It has a half-life of about 30 years, meaning it takes that long for half of a sample to decay into a stable form, specifically barium-137.
Due to its radioactive properties, cesium-137 is used in various applications, including medical treatments, industrial gauges, and radiation therapy for cancer. However, it can also pose health risks if not handled properly, as exposure to radiation can lead to serious health issues.