Molière's Theory of Multiple Scattering

Moleère's theory of multiple scattering of electrons and other charged particles is here derived in a mathematically simpler way. The differential scattering law enters the theory only through a single parameter, the screening angle ${{\chi }_a}^{\prime }$, Eq. (21). The angular distribution, except for the absolute scale of angles, depends again only on a single parameter $b$, Eq. (22). It is shown that $b$ depends essentially only on the thickness of the scattering foil in g/${\mathrm{cm}}^2$, and is nearly independent of $Z$.