Differential and Direct Differential Elastic Scattering Cross Sections for Electrons and Potassium Atoms

14 August 1972

journal article
research article
Published by American Physical Society (APS) in Physical Review Letters

Vol. 29 (7) , 398-401
https://doi.org/10.1103/physrevlett.29.398

Abstract

In a modulated crossed-beam experiment we have elastically scattered unpolarized electrons of 3.3 eV energy from spin-polarized K atoms. A measurement of the polarization of the scattered electron yields

\frac{{| f (θ) |}^{2}}{σ (θ)}

. Our measured values of

\frac{{| f |}^{2}}{σ (θ)}

show a significant angular shift relative to the theoretical curve in forward-angle scattering (

θ = 20^{\circ} - 40

°). This shift is not apparent in measurements of the differential scattering cross section

σ (θ)

over the same angular range, which, however, do show a significant angular shift in the range

θ = 50^{\circ} - 120

°.

Keywords

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