Fundamental Physics

Experimental Physics Matter and Antimatter Particle Physics Standard Model Elementary Particles Constants of Nature Research Collaborations Neutrino Research Atomic Transitions Mass States

Researchers Drive Thorium-229 Nuclei With Laser Inside Opaque Solid

The result opens nontransparent hosts for nuclear spectroscopy, enabling conversion‑electron detection toward a thorium‑based optical clock.

Electroplated Thorium on Steel Delivers Key Step Toward Compact Nuclear Clocks

JUNO Neutrino Observatory Starts Data Taking After 20,000-Ton Fill

China's JUNO Neutrino Observatory Starts Collecting Data to Probe Mass Ordering

Enhanced Dual-Comb Spectroscopy Reveals Previously Unknown Samarium Transitions

Largest Global Optical Clock Comparison Paves Way to Redefine the Second

Atomic Clocks Installed on ISS Begin 30-Month Physics Experiment

Breakthrough Prize Gala Honors Scientific Achievements with $3 Million Awards