These are the telltale signs of helium excimers — a molecule formed when one energetically excited helium atom sticks to another helium atom. (Normally, helium is a noble gas and doesn't bind ...

Scientists can't figure out why forces within the helium atom's nucleus continue to defy theory after decades of experiments. (Image credit: Getty) ...

Muonic helium-3 is a special form of helium in which the atom s two electrons are replaced by a single, much heavier muon. Skip to main content. Your source for the latest research news.

Only about one helium-3 atom exists for every million helium-4 atoms, Horton said. The team measured about 10 million helium-3 atoms per gram of olivine crystals.

Scientists can get some idea of where an atom of helium originated by looking at the number of neutrons in its nucleus—a figure that distinguishes different species, or isotopes, of the element.

All the latest science news on helium atom from Phys.org. Find the latest news, advancements, and breakthroughs.

Only about one helium-3 atom exists for every million helium-4 atoms, Horton said. The team measured about 10 million helium-3 atoms per gram of olivine crystals.

Muonic helium-3 is a special form of helium in which the atom’s two electrons are replaced by a single, much heavier muon. Yesterday, the results have been published in the prestigious journal ...