Helium atoms (green cubes) are arranged in a 3-D checkerboard structure, each surrounded by eight sodium atoms (purple). Electron pairs (red) sit in the spaces between helium atoms.

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 ...

This beam was what was used in the experiments. The antiprotons were directed into liquid helium, where some of the helium atoms had been ionized, meaning they lost one of their two electrons.

Atom Camera? Helium Atoms Sent By Nozzle May Light Way For New Imaging Approach Date: August 5, 2006 Source: University Of Oregon Summary: A newly devised nozzle fitted with a pinhole-sized ...