There Aldo Antognini's team generates so-called muonic helium-3, in which the two electrons of the helium atom are replaced by an elementary particle called a muon. This allows the nuclear radius ...

This process goes on and on for the 2.2 hours that the atom is in the metastable state and then the atom falls back down to the regular ground helium state. Scientists are able to study this ...

Absolutely bonkers experiment measures antiproton orbiting helium ion It's a potentially useful technique—and it's surprising that it works. John Timmer – Mar 16, 2022 12:00 pm | 70 ...

One is Na₂He, which consists of one helium atom and two sodium atoms, while the other is Na₂He O, ... Crystal structure of Na₂He, which resembles a 3D checkerboard.

Pionic helium In this experiment, a pion – shown here with one orange and one blue particle representing its quark and anti-quark – replaces one of the two electrons in the helium atom. This new ...

How to fake super-heavy hydrogen In a feat of modern-day alchemy, atom tinkerers have fooled hydrogen atoms into accepting a helium atom as one of their own. The camouflaged atom behaves ...

Physicists have created the first-ever atomic vortex beam — a swirling tornado of atoms and molecules with mysterious properties that have yet to be understood.

Helium is the simplest element in the periodic table with more than one particle in its nucleus, yet state of the art theory and experiments on it don't add up.