Abstract
Positrons (e+), or anti-electrons, can be valuable probes of fundamental interactions between charged particles and atoms, molecules, liquids and solids1ā4. Positronium (Ps) is the bound state of a e+ and an electron (eā) and precision measurements of its energy levels5, decay rates6 and modes7 can provide rigorous tests of bound state QED calculations. Recently, the realization of quasi-monoenergetic beams of such exotic atoms8 has enabled the controlled scattering of Ps from simple atomic targets9. In atomic collisions with positrons, experimental studies have advanced to the study of problems concerned with the near-threshold10 and differential11 behaviour of scattering processes as well as beginning to address more dilute targets such as atomic hydrogen12 and the alkalis13.
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Laricchia, G. (1995). Studies with Polarized Positrons. In: Kleinpoppen, H., Newell, W.R. (eds) Polarized Electron/Polarized Photon Physics. Physics of Atoms and Molecules. Springer, Boston, MA. https://doi.org/10.1007/978-1-4899-1418-7_12
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DOI: https://doi.org/10.1007/978-1-4899-1418-7_12
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