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Caesium standard

The caesium standard is a primary frequency standard in which the photon absorption by transitions between the two hyperfine ground states of caesium-133 atoms is used to control the output frequency. The first caesium clock was built by Louis Essen in 1955 at the National Physical Laboratory in the UK and promoted worldwide by Gernot M. R. Winkler of…

Measurement & Standards

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Technical details

Parameters and significance in the second and other SI units

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Caesium standard

Nodes108
Edges107
Triples28
Avg. degree1.98
Density0.018519
Components1

How this topic connects Entity context

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Caesium standard

Top relations

related to Optical units · 14
Caesium standard → After, Frequency, From, Hz, IPK, Jluminous, KCD, SI, The, This, THz, THzTime, Unlike, Wluminous
related to Amount of substance · 4
Caesium standard → Avogadro, From, IPK, The
related to Length · 3
Caesium standard → In, The, This
related to Time and frequency · 3
Caesium standard → Bq, Hz, The
related to Parameters and significance in the second and other SI units · 2
Caesium standard → Suppose, Velocity
is a · 1
Caesium standard → primary frequency standard in which the photon absorption by transitions between the two hyperfine ground states of caesium-133 atoms is used to control the output frequency

Important terminology Word statistics

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Important terminology

second caesium frequency defined radiation standard units energy hyperfine si time definition caesium-133 transition hz atom 2019 δνcs unit mole

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
Caesium standardis aprimary frequency standard in which the photon absorption by transitions between the two hyperfine ground states of caesium-133 atoms is used to control the output frequency0.90text
the Earth's magnetic fieldinstance ofin the absence of external influences0.80text
Caesium standardrelated to Amount of substanceThe0.60section
Caesium standardrelated to Amount of substanceFrom0.60section
Caesium standardrelated to Amount of substanceIPK0.60section
Caesium standardrelated to Amount of substanceAvogadro0.60section
Caesium standardrelated to LengthIn0.60section
Caesium standardrelated to LengthThe0.60section
Caesium standardrelated to LengthThis0.60section
Caesium standardrelated to Optical unitsFrom0.60section
Caesium standardrelated to Optical unitsSI0.60section
Caesium standardrelated to Optical unitsAfter0.60section

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