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Laser-Cooling Measures Quantum-Mechanical

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A team of researchers at Stanford University in California have confirmed that the value of g, acceleration caused by gravity, is constant with respect to mass and size. The physicists employed laser cooling to construct an atom interferometer that measured the rate of fall of cesium atoms. They found that the atoms experienced an acceleration that agreed with the g on macroscopic objects to within seven parts in a billion. The team cooled about 5 x 108 atoms to 1.5 µK, launched them with a series of microwave pulses and measured their rate of descent by observing Raman scattering...Read full article

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    Published: November 1999
    Basic ScienceResearch & TechnologyTech PulseLasers

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