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Home >> Sci-Edu
UPDATED: 18:47, November 30, 2006
Domestic cesium atom fountain clock built
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The Ministry of Science and Technology announced that in collaboration with many countries, China has successfully developed a cesium atom fountain clock. China's new cesium atomic frequency standard will lose less than 1 second every 6 million years. Previously the standard was set to lose 1 second every 300 thousand years.

The cesium atom fountain clock is extremely precise and the structure is very complicated. Only a small number of countries including France, the US and Germany have built such clocks, which help to define Coordinated Universal Time (UTC).

By People's Daily Online


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