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High-resolution, low-energy positron scattering from helium: measurements of the total scattering cross section

Sullivan, James; Makochekanwa, Casten; Jones, Anthony; Caradonna, Peter; Buckman, Stephen

Description

We present high-resolution (80 meV FWHM) measurements of the positron-helium total cross section in the energy range between 1 and 15 eV. The absolute magnitude of the cross section is in excellent agreement with recent state-of-the-art theoretical calculations and with previous absolute measurements (e.g. Mizogawa et al). Specific scans in the 1-3 eV and 5-8 eV energy regions reveal no evidence of the structures in the cross section reported by Karwasz et al.

CollectionsANU Research Publications
Date published: 2008
Type: Journal article
URI: http://hdl.handle.net/1885/49969
Source: Journal of Physics B: Atomic, Molecular and Optical Physics
DOI: 10.1088/0953-4075/41/8/081001

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