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Wednesday, November 16, 2011

Nuclear Clock More Accurate than Atomic Clock

Atomic clocks for many years considered the most accurate tool for measuring time. Even GPS devices commonly found in mobile devices using atomic clocks as the basis for the measurement of time. Now, the title seems to be left to the nuclear clock, which is much more accurate.

Nuclear clock using an atomic nucleus as a fine needle. An atomic nucleus moves up and down for two specific energy levels if shot by a laser light at very specific frequencies. This frequency is in turn used as a marker of beating time. In this way, the nuclear clock will be 60 times more accurate than atomic clocks.

But the nuclear clock is still limited to the idea. Until now the most accurate measure of time is atomic clock, which just missed as much as 4 seconds since the universe formed 13.7 billion years ago. This clock uses electrons leap as a fine needle. Unfortunately, electron flow is often disturbed by the electric and magnetic fields which ultimately affects the accuracy.

The concept of nuclear clock initiated by Corey Campbell of the Georgia Institute of Technology. They use thorium atoms are controlled by the laser. As a result, the movement of atomic nuclei only deviated as much as 1 second every 200 billion years.

"The level of precision is so high that the error can be ignored," commented metrology expert from the National Metrology Institute of Germany, Ekkehard Peik, commenting on the research. Before this concept is applied superakurat hours in the real world, scientists must find the right frequency to drive the thorium nuclei. *** [NEWSCIENTIST | ANTON WILLIAM | KORAN TEMPO 3703]
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