cesium
9
8.3
- noun
- /ˈsiːziəm/
- Specialized
:
cesio
- Of greatest concern are cesium isotopes, whose half-life ranges from thirty years to centuries.
- cesium iodide
- cesium atom
- cesium clock
But why is that cesium only showing up in bores?
- But why is that cesium only showing up in bores?
- So we have cesium beam clocks which are based on the cesium atom.
Examples
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GPS satellites rely on cesium and rubidium atoms as frequency standards.
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The resonant frequency of the cesium atom, for example, is 9,192,631,770 Hertz (or cycles per second).
Academic text (2011) -
Even on the site, the levels of cesium concentration in the air are still very low.
Blog text (5) -
But why is that cesium only showing up in bores?
-
So we have cesium beam clocks which are based on the cesium atom.
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We looked at cesium, sodium and lithium were too small, but potassium is just right.
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We have a whole suite of atomic clocks, cesium clocks, hydrogen mazers, and our cesium fountain.
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I believe that cesium clocks use the crystalline vibrations of cesium, not its radioactive decay, as the time signal.
Blog text (5) -
High-activity isotopes for medical applications include cesium-137, cobalt-60, iridium-192, and strontium-90.
Academic text (2012) -
The properties of cesium make it ideal for use in atomic clocks.
Synonyms
12
9.1
A soft silver white metal that is liquid at room temperature
Compounds
Surface Forms
Etymology
Cesium comes from the Latin word caesius, which means 'sky blue', because when scientists first looked at the element's light they saw very bright blue lines. That's why the metal was named cesium, so you can remember it by thinking of those blue lines.