Assertion: atomic clock | /r/CapableOf | use cesium atoms
Facets:
value: as the vibration source
type: MANNER
Source sentences:
text: By 1949, the National Bureau of Standards (NBS, now the National Institute of Standards and Technology, NIST) announced the world’s first atomic clock using the ammonia molecule as the source of vibrations, and by 1952 it announced the first atomic clock using cesium atoms as the vibration source, NBS-1.
text: The most accurate atomic clocks available today use the cesium atom and the normal magnetic fields and detectors.
text: — NIST announces the first atomic clock using cesium atoms as the vibration source.