Mercury atomic clock keeps time with record accuracy

An experimental atomic clock based on a single mercury atom is now at least five times more precise than the national standard clock based on a "fountain" of cesium atoms, according to a paper by physicists at the Commerce Department's National Institute of Standards and Technology (NIST) in the July 14 issue of Physical Review Letters.

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<p><a href="http://www.physorg.com/news72105805.html">Mercury atomic clock keeps time with record accuracy</a></p> <p>An experimental atomic clock based on a single mercury atom is now at least five times more precise than the national standard clock based on a "fountain" of cesium atoms, according to a paper by physicists at the Commerce Department's National Institute of Standards and Technology (NIST) in the July 14 issue of <i>Physical Review Letters</i>.</p>