caesium


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Related to caesium: caesium 137

caesium

See cesium.

ce·si·um

(Cs) (sē'zē-ŭm)
A metallic element, atomic no. 55, atomic wt. 132.90543; a member of the alkali metal group. 137Cs (half-life equal to 30.1 years) is used in treatment of certain malignancies.
Synonym(s): caesium.
[L. caesius, bluish gray]

ce·si·um

(Cs) (sē'zē-ŭm)
A metallic element used in treatment of some malignancies.
Synonym(s): caesium.
[L. caesius, bluish gray]

caesium

cesium.
References in periodicals archive ?
Now, these previous competitors can complement one another, and the technology of the optical clock leads to a considerable improvement of the established caesium clocks.
Caesium fountains are more accurate than "normal" atomic caesium clocks, because in fountains, the caesium atoms are cooled down with the aid of laser beams and come ever slower.
Thus, the atoms remain together for a longer time so that the physicists have considerably more time to measure the decisive property of the caesium atoms which is required for the "generation of time": their resonance frequency.