Superfluid helium has produced a narrow muonium beam, opening a path to test whether exotic particles fall like ordinary matter.

The shape of an atomic nucleus showed up in the debris of a collider crash, and neon's core turned out to look like a bowling ...

Gamma rays are a form of electromagnetic radiation, just like visible light and radio waves, but they carry much more energy.

Physicists at CERN have found a new way to peer deep inside atomic nuclei and distinguish between two competing explanations ...

Two teams of physicists have made the world's first nuclear clocks. These radical new devices keep time using fluctuations in the energy states of an atom's nucleus, rather than those of its electrons ...

A breakthrough in chronometry decades in the making could redefine the limits of how we keep time. Using atoms of thorium-229, physicists have built functional clocks based not on the oscillations of ...

Somewhere above Earth, natural radiation may be doing what spies cannot: probing satellites for hidden nuclear weapons. Although the 1967 Outer Space Treaty bans nuclear weapons in space, there’s ...

Every time you check the time on your phone, make an online transaction, or use a navigation app, you are depending on the precision of atomic clocks. Scientists are developing next-generation atomic ...

Nuclear isomers are crucial probes for studying the structure of nuclei. Unlike chemical isomers—which have the same chemical formula but different arrangements of atoms—nuclear isomers are nuclei ...

Vladan Vuletić with members of his Experimental Atomic Physics group. From left to right: Matthew Radzihovsky, Leon Zaporski, Qi Liu, Vladan Vuletić, and Gustavo Velez. Every time you check the time ...

She laid much of the theoretical groundwork for the atomic bomb, although she did not participate directly in its production. By Special to The New York Times This obituary was originally published on ...