Sentences with phrase «caesium atomic»

• In a caesium atomic clock, 9 billion cycles per second (9 gigahertz) is the frequency of radiation emitted when...

The second is currently defined by caesium atomic clocks, but optical clocks promise higher precision because their atoms oscillate at the frequencies of light rather than in the microwave band, so they can slice time into smaller intervals.

Not exact matches

The NPL's atomic clocks measure how often a caesium atom's electrons jump between two energy levels — a little more than 9 billion jumps equal one second.

In the 1990s, a team led by Nobel laureate Steven Chu made an «atomic fountain» of caesium atoms, launching them 30...

A new generation of atomic tickers, known as optical clocks, have just wrested the record for accuracy from the ensembles of oscillating caesium atoms that held it for half a century.

And because hydrogen molecules consist of just a handful of particles, compared with the larger caesium atoms used in atomic clocks, it would be easier to do theoretical calculations and compare them with real experiments, the team says.

Most atomic clocks use atoms of the isotope caesium - 133.