Differential cross sections for the elastic scattering of electrons by multiply charged ions have been measured at scattering angles between 32 • and 148 • . Mainly at backward angles the cross section deviates remarkably from the Rutherford cross section showing oscillations due to the structure of the ionic core. Experimental results obtained for Ar 8+ ions and different Xe q+ ions (3 q 6) are found to compare well with theoretical calculations.
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