cesium135

Cesium-135 is a radioactive isotope of cesium. It is a fission product produced in nuclear reactors and nuclear weapons. Cesium-135 has a relatively long half-life of approximately 2.3 million years, meaning it decays very slowly. Its decay product is stable barium-135.

The radioactive decay of cesium-135 primarily emits beta particles. While it is a fission product, its contribution to the immediate radiological hazard of spent nuclear fuel is less significant than some other isotopes due to its long half-life and relatively low energy beta emissions. However, its long persistence in the environment is a factor in long-term waste management considerations.

Cesium-135 is chemically similar to other alkali metals, meaning it can readily dissolve in water and can be absorbed by plants and animals. This chemical behavior is a concern for environmental contamination. Due to its mobility in the environment, it can potentially accumulate in the food chain.

The presence of cesium-135 in nuclear waste requires careful handling and disposal strategies to ensure long-term containment and prevent environmental release. Its slow decay rate means that waste containing cesium-135 will remain radioactive for geological timescales.