It inspired Niels Bohr’s groundbreaking model of the atom in the early twentieth century, ... Hori et al. record the first observation of a transition in a ‘pionic’ helium atom.

Helium is the simplest multi-body atom. Its energy levels can be calculated with extremely high precision only relying on a few fundamental physical constants and the quantum electrodynamics (QED ...

The innovative idea from the three researchers involved proposing a different view of the excited nucleus: instead of seeing it as a closed quantum system, the trio of researchers preferred to ...

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.

Measurement of a helium tune-out frequency: an independent test of quantum electrodynamics. Science , 2022; 376 (6589): 199 DOI: 10.1126/science.abk2502 Cite This Page : ...

The artificial atom was stable for several nanoseconds, or a few billionths of a second. A short time indeed, but over 1,000 times longer than typical interactions between atomic nuclei and pions ...

Neutral helium microscopy and atom optics constitute an innovative imaging paradigm that exploits low-energy, charge-neutral helium atoms to non-destructively investigate surface properties at the ...

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

Observing chemical reactions in space, like on cold grains of dust, is currently impractical, so helium nanodroplet experiments present a unique opportunity for discovery, he says. Journal ...