Electron-Like Scattering of Positronium

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...

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Published inScience (American Association for the Advancement of Science) Vol. 330; no. 6005; p. 789
Main Authors Brawley, S.J, Armitage, S, Beale, J, Leslie, D.E, Williams, A.I, Laricchia, G
Format Journal Article
LanguageEnglish
Published Washington, DC American Association for the Advancement of Science 05.11.2010
The American Association for the Advancement of Science
Subjects
Antimatter
Atomic and molecular collision processes and interactions
Atomic and molecular physics
Atomic interactions
Atomic properties
Biological and medical sciences
BREVIA
Data lines
Electrons
Exact sciences and technology
Investigative techniques, diagnostic techniques (general aspects)
Mathematical minima
Matter & antimatter
Medical sciences
Miscellaneous. Technology
Molecular physics
Physics
Positron scattering
Positronium
Positrons
Radionuclide investigations
Scatter
Scattering
Positron-atom collisions
Cross sections
Positron emission tomography
Positron-molecule collisions
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Summary: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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ISSN:0036-8075
1095-9203
DOI:10.1126/science.1192322