Khabre branded placeholder image

science

Thorium-229 nuclear clock locks a laser to a nuclear transition

Researchers operated a thorium-229 nuclear clock by using absorption in a crystal to steer the laser probing the nuclei. They also used the clock to search for oscillations that could be caused by ultralight dark matter.

Khabre branded placeholder image

science

Thorium-229 Nuclear Clock Signal Detected by Absorption

Researchers detected the low-energy nuclear resonance of thorium-229 using a continuous-wave laser and absorption measurements rather than slow fluorescence detection. The technique provides a faster spectroscopy and feedback method for developing a solid-state nuclear clock.