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First Nuclear Clocks Tick Using Thorium-229

Original: Thorium 229 based nuclear clocks

Researchers at Tsinghua University and TU Wien have reported the first working nuclear clocks based on thorium-229, a long-sought breakthrough that uses an atomic nucleus instead of electron transitions to keep time. The development follows years of effort to pin down thorium-229's uniquely low-energy nuclear transition, promising clocks far more stable than today's best optical atomic clocks.

Why now: A long-anticipated physics milestone has finally been demonstrated, drawing attention to its implications for precision timekeeping and fundamental constants research.

Tsinghua UniversityTU Wienthorium-229nuclear clock

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Evidence

• Thorium 229 based nuclear clocks · oofbey · 4

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