Magnetic field-free measurements of the total cross section for positrons scattering from helium and krypton

S. E. Fayer, A. Loreti, S. L. Andersen, A. Kövér, G. Laricchia

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

An electrostatic beam has been used to perform scattering measurements with an angulardiscrimination of ≲2. The total cross sections of positrons scattering from helium and krypton have been determined in the energy range (10300) eV. This work was initially stimulated by the investigations of Nagumo et al (2011 J. Phys. Soc. Japan 80 064301), the first positron field-free measurements performed with a similarly high resolution, which found significant discrepancies at low energies with most other experiments and theories. The present results show good agreement with theories and several other measurements, even those characterized by a much poorer angular discrimination, implying a small contribution from particles elastically scattered at forward angles, as theoretically predicted for He but not for Kr.

Original languageEnglish
Article number075202
JournalJournal of Physics B: Atomic, Molecular and Optical Physics
Volume49
Issue number7
DOIs
Publication statusPublished - Mar 17 2016

Fingerprint

krypton
positrons
helium
cross sections
scattering
magnetic fields
discrimination
Japan
electrostatics
energy
high resolution

Keywords

  • brightness enhancement
  • electrostatic transport
  • helium
  • krypton
  • positron beam
  • positron scattering
  • total cross section

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Atomic and Molecular Physics, and Optics

Cite this

Magnetic field-free measurements of the total cross section for positrons scattering from helium and krypton. / Fayer, S. E.; Loreti, A.; Andersen, S. L.; Kövér, A.; Laricchia, G.

In: Journal of Physics B: Atomic, Molecular and Optical Physics, Vol. 49, No. 7, 075202, 17.03.2016.

Research output: Contribution to journalArticle

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