| Caesium metal is used in the following applications: • As a “getter” in low-voltage electron tubes, to scavenge trace amounts of oxygen. • Caesium 137, recovered from waste of atomic plants is used as a gamma-ray emitter; it has a half-life of 33 years. • It finds use also in teletherapy. • Caesium is used in atomic clocks, where a loss of 5s over 300 years is achievable. • Caesium may also be used as a catalyst for hydrogenation of certain organic compounds. • It has also been considered for in ion propulsion systems, for outer space uses. • In photoelectric cells as a photosensitive deposit on the cathode. The caesium metal in this application is also used in the infrared signalling lamp (known as a photophone) in this application it gives infrared waves without visible light. Caesium compounds have been implemented on filaments of radio tubes to increase sensitivity. |