Atomic fountain clocks are becoming still more stable

They are at present the most accurate clocks in the world: Caesium fountain clocks furnish the second accurate to 15 places after the decimal point. Until they reach this accuracy, caesium fountain clocks, however, need a certain measurement time.

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<p><a href="http://www.physorg.com/news156618694.html">Atomic fountain clocks are becoming still more stable</a></p> <p>They are at present the most accurate clocks in the world: Caesium fountain clocks furnish the second accurate to 15 places after the decimal point. Until they reach this accuracy, caesium fountain clocks, however, need a certain measurement time. </p>