The Scattering of Fast Electrons by Metals. II. Polarization by Double Scattering at Right Angles

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Abstract
The first paper of this series discussed methods of counting fast electrons, a consideration of which has shown the need for further experiments looking for polarization of fast electrons. The present paper concerns a search for polarization by double scattering at right angles, using radium E as a source, and a sensitive gold leaf electroscope to detect the arrival of the scattered electrons, the slower electrons being eliminated from the experiment. A peculiar type of polarization appears, which can be described as follows, using the notation of previous papers. At moderate electron speeds the number counted in the configuration called 0° is greater than the number counted at 180°. This effect does not appear for very slow electrons. As the speed of the electrons approaches that of light, the above type of polarization persists, and another type appears, superposed upon the first; the number counted at 270° becomes greater than the number counted at 90°. Previous experiments of a similar nature, in which one or the other of the above effects appears, are discussed.

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