The cesium-beam standard used for this measurement could be operated for only short periods, so the uncertainty of Lyon¿s measurement was too large for it to serve as the basis for a new definition.

The Cesium 133 uses a chip-scale atomic clock (CSAC) to maintain accurate time. The name of the watch comes from the cesium 133 atom which is officially used to define a second in time.

You'll need to pledge $6,000 to be one of the first to receive a Cesium 133 prototype watch. At present, there are only two left at this price so if fancy watches are your thing, you better get on ...

We normally think of atomic clocks as the gold standard in timekeeping. The very definition of a second — in modern times, at least — is 9,192,631,770 periods of the radiation correspon… ...

Since 1967, the second has been defined by the cesium 133 atom. Understanding atom movement helps in the study of gravitational waves. A second is only a second because we’ve defined it as such.

The cesium-133 atom, for instance, oscillates exactly 9,192,631,770 times per second, and it’s so stable that this pattern has officially defined the second since 1968.

2005 marks the 50th anniversary of the cesium atomic clock. In 1955, Dr. Louis Essen and Jack Perry developed the first accurate cesium atomic clock at. Aspencore network. News & Analytics Products ...

(waves ticking) (air whooshes) Today, a second is officially defined by counting the oscillations of the primary resonant frequency of a Cesium-133 atom. That's over 9 billion oscillations per second.