Reaching a record low temperature.
The NIST team achieved the new record using a technique borrowed from researchers at the Ecole Normale Superieure in Paris (SN: 7/16/94, p.47). William D. Phillips and his colleagues at NIST trapped cesium atoms in an "optical lattice" created by four intersecting laser beams. Oscillating back and forth in the "hollows" of this lattice, the trapped atoms reach a temperature close to 1 microkelvin. Reducing the laser intensity drives the temperature to 700 nK, slowing the atoms to an average velocity of 7 millimeters per second.
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|Title Annotation:||National Institute of Standards and Technology use "optical lattice" to trap and slow atoms, chilling them to 700 nanokelvins|
|Article Type:||Brief Article|
|Date:||Sep 10, 1994|
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