November 29th, 2005 | researchmaterial
Allen Mills of the University of California, Riverside, and his colleagues say they have seen telltale signs of positronium molecules, made from two positronium atoms.
Positronium is an other-worldly mimic of hydrogen… just as hydrogen atoms will combine to form two-atom molecules, so it should be possible in theory to unite two positronium atoms to form a molecule, which would be written as Ps2.
But positronium does not exist naturally, because matter and antimatter annihilate one another when they meet, releasing a burst of energy. When a positron and electron are combined artificially to create a positronium atom, as was first done in 1951, it quickly self-destructs, emitting energy as a gamma ray…