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Metrology

Metrology

Second team uses laser to excite thorium-229 nuclear transition

14 Jul 2024 Hamish Johnston
Thorium clock
Crystal timekeeper The thorium-229 nuclei were trapped in a fluorine-rich crystal. (Courtesy: David Esquivel/UCLA)
Back in April of this year we reported that researchers in Germany and Austria were the first to use

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Hamish Johnston is an online editor of Physics World
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