Statements (15)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
atomic clock
|
| gptkbp:accuracy |
less accurate than cesium atomic clock
|
| gptkbp:category |
frequency standard
|
| gptkbp:firstDemonstrated |
1949
|
| gptkbp:frequency |
about 23.87 GHz
|
| https://www.w3.org/2000/01/rdf-schema#label |
Ammonia maser clock
|
| gptkbp:inventedBy |
gptkb:Norman_Ramsey
|
| gptkbp:predecessor |
gptkb:cesium_atomic_clock
|
| gptkbp:principle |
stimulated emission of radiation
|
| gptkbp:relatedTo |
hydrogen maser clock
|
| gptkbp:usedIn |
early timekeeping experiments
|
| gptkbp:uses |
ammonia maser
microwave transition of ammonia molecules |
| gptkbp:bfsParent |
gptkb:Atomic_Clocks
|
| gptkbp:bfsLayer |
8
|