Cesium is a chemical element that is used in various technologies like clocks and scientific instruments. It is a silver-white metal that can explode if it comes into contact with water. Full definition
Conventional atomic clocks work by tuning microwaves until they are exactly the right frequency to flip the spins in a beam of cesium atoms. (sciencemag.org)
The large orbit of the loosely bound outer electron of cesium atoms would repel the negative charge of the helium atom — overcoming the van der Waals forces that normally help spread superfluid helium over a surface. (sciencemag.org)
This situation requires a more potent nutrient treatment such as Cesium Chloride, for example. (cancertutor.com)