An international research team led by the Paul Scherrer Institute PSI has measured the radius of the nucleus of muonic helium ...

Helium atom precision measurements and calculations have a history of nearly a century. In the 1960s, theorists discovered that the fine-structure split (23P0-23P2) of the 23P energy level of ...

That radiation ionizes the helium by knocking out one of the two electrons in each atom. These helium ions then combine with free electrons in the planet's atmosphere and often the new electron ...

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 chemically like hydrogen, but has four ...

The pionic helium atom enables scientists to study pions in an extremely precise manner using laser spectroscopy. The research is published in this week's edition of Nature. The challenge the team ...

In a world first, researchers have recorded exactly how solvents interact with dissolved materials, one atom at a time. After a solute, such as salt, dissolves in a solvent, such as water, the two ...

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. By sending a straight beam of ...

Researchers have now created a new type of artificial atom in which a helium nucleus is orbited not by an electron but by a pion. Helium is not just for party balloons. It is the second lightest ...