Brevia

Electron-Like Scattering of Positronium

Science  05 Nov 2010:
Vol. 330, Issue 6005, pp. 789
DOI: 10.1126/science.1192322

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Abstract

Positronium (Ps), a hydrogen-like atom composed of an electron and its antimatter partner, the positron, is formed in considerable quantities whenever positrons interact with matter. It has unexpectedly been found to scatter from a wide variety of atoms and molecules in a way very similar to that of a bare electron moving at the same velocity, despite Ps being neutral and twice the mass.

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