The quest to create the perfect scientific timepiece has led to the development of an atomic clock that researchers from JILA claim to be fifty percent more accurate than results reported last year.
JILA, is a joint institute of the National Institute of Standards and Technology (NIST) and the University of Colorado (CU) at Boulder.The international team, which included Jan W. Thomsen, a nuclear physicist and visiting professor from the Niels Bohr Institute in Denmark, applied new techniques that resulted in an enhanced strontium atomic clock that would neither gain nor lose one second in more than 300 million years.This level of accuracy leapfrogs that of the current version of NIST-F1, a cesium fountain atomic clock that neither gains nor loses a second in about 80 million years and serves as the U.S. civilian time and frequency standard. More at; http://blogs.zdnet.com/emergingtech/?p=1456