In order to understand some of the systematic effects associated with conventional Mott-scattering electron polarization measurements, we analyzed asymmetry data obtained with 94-keV polarized electrons scattered at 120^∘{} from gold-foil targets ranging in thickness from 27 to 62 {μ}g/cm². Based upon an examination of the influence of multiple and plural scattering, we conclude that the precision of such Mott measurements is fundamentally limited by an experimental uncertainty of greater than ±{}2.5% and an absolute uncertainty of approximately ±{}5%, considerably worse than is customarily assumed. We believe that similar conclusions can be drawn for measurements made with ``compact'' cylindrical and spherical Mott polarimeters.
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Fletcher et al. (1986) studied this question.
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