Researchers have now found a way to make nuclear clocks a thousand times less radioactive and more cost-effective, thanks to a method creating thin films of thorium tetrafluoride (ThF4).
Scientists in the United States have made significant achievements for the development of a practical nuclear clock . A team of researchers, led by JILA and NIST Fellow and University of Colorado, found that physical vapour deposition of thorium-229 could reduce the amount of this expensive and radioactive isotope needed to make a timekeeper.
But the development of such clocks has been challenging as thorium-229, one of the isotopes used in nuclear clocks, is rare, radioactive, and extremely costly to acquire in the substantial quantities required for this purpose.clocks a thousand times less radioactive and more cost-effective, thanks to a method creating thin films of thorium tetrafluoride .marks a potential turning point in the development of nuclear clocks.
“As a standard of frequency a solid state clock is not very good because it’s affected by the environment. As soon as we know the frequency very accurately we will do it with ions, but that has not been done yet,” added Flambaum.
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