A laser worthy of a nuclear clock
The nucleus of the thorium-229 isotope has a special property: it has an excited state that's incredibly close in energy to its ground state. The existence of such an isomer is remarkable because…
cadmium
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Get to the bottom of it
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The nucleus of the thorium-229 isotope has a special property: it has an excited state that's incredibly close in energy to its ground state. The existence of such an isomer is remarkable because…