positronium

☆ posi·tro·nium (päz′i trō′nē əm)

noun

a short-lived atomic system formed of an electron and a positron before they interact to annihilate each other

Etymology: positron + -ium

Modifies a noun

formation: J W Humberston and P Van Reeth Investigation of positronium formation in positron collisions with atoms having zero threshold energy, Nucl.
collision: Measurements of differential ionization and positronium collisions are in their infancy.
scattering: This work will complement the experimental studies of positronium scattering being carried out in the Department.
atom: Furthermore, Mike Charlton and Helmut Telle are to combine their positron and laser physics backgrounds to initiate spectroscopic investigations of positronium atoms.

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