cesium-beam

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• Crossed molecular beam — experiments are chemical experiments where two beams of atoms or molecules are collided together to elucidate the dynamics of the chemical reaction, and can detect individual reactive collisions.[1] Technique In a crossed molecular beam apparatus …   Wikipedia

• CBFS — cesium beam frequency standard …   Military dictionary

• atomic clock — an extremely accurate electronic clock regulated by the resonance frequency of atoms or molecules of certain substances, as cesium. [1935 40] * * * ▪ instrument       type of clock that uses certain resonance frequencies of atoms (usually cesium… …   Universalium

• NIST-F1 — NIST F1, source of the official time of the United States NIST F1 is a cesium fountain clock or atomic clock in the National Institute of Standards and Technology (NIST) in Boulder, Colorado, and serves as the United States primary time and… …   Wikipedia

• Essen, Louis — ▪ 1998       British physicist (b. Sept. 6, 1908, Nottingham, Nottinghamshire, Eng. d. Aug. 24, 1997, Great Bookham, Surrey, Eng.), built the cesium beam atomic clock, a device that ultimately changed the way time is measured. Atomic clocks… …   Universalium

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