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Fitting phase shifts to electron-ion elastic scattering measurements

Lookup NU author(s): Manolo Per Carlos, Professor Alan Dickinson

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Abstract

We have derived non-Coulomb phase shifts from measured differential cross sections for electron scattering by the ions Na+, Cs+, N+3, Ar8+ and Xe6 at energies below the inelastic threshold. Values of the scaled squared deviation between the observed and fitted differential cross sections, χ2, for the best-fit phase shifts were typically in the range 3-6 per degree of freedom. Generally good agreement with experiment is obtained, except for wide-angle scattering by Ar8+ and Xe6+. Current measurements do not define phase shifts to better than ≈0.1 rad even in the most favourable circumstances and uncertainties can be much larger.

Publication metadata

Author(s): Per MC, Dickinson AS

Publication type: Article

Publication status: Published

Journal: Journal of Physics B: Atomic, Molecular and Optical Physics

Year: 2000

Volume: 33

Issue: 17

Pages: 3485-3494

ISSN (print): 0953-4075

ISSN (electronic): 1361-6455

Publisher: Institute of Physics Publishing Ltd.

URL: http://dx.doi.org/10.1088/0953-4075/33/17/324

DOI: 10.1088/0953-4075/33/17/324

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