Positron scattering from helium

POSTER

Abstract

We present new measurements of positron scattering cross sections for helium, including total scattering, total elastic and total inelastic cross sections, which have been extended up to energies of 180eV. We also present a range of low energy elastic differential cross sections. The measurements were performed using our high-resolution, Surko trap-based positron beamline with a typical energy resolution of $\sim $50meV. Comparisons will be made with previous experimental results and with up to date theoretical predictions.

*This work is supported by the ARC.

Authors

  • Roisin Boadle

    • CAMS, Australian National University, Canberra

  • Joshua Machacek

    • CAMS, Australian National University, Canberra

  • Emma Anderson

    • CAMS, Australian National University, Canberra

  • Peter Caradonna

    • CAMS, Australian National University, Canberra

  • Casten Makochekanwa

    • CAMS, Australian National University, Canberra

  • Adric Jones

    • CAMS, Australian National University, Canberra

  • James Sullivan

    • CAMS, Australian National University, Canberra

  • Stephen Buckman

    • CAMS, Australian National University, Canberra