Abstract

Numerical calculations have been carried out for the multiple scattering of charged particles as described by the theories of Molière and of Nigam, Sundaresan and Wu (NSW). The NSW theory is the more accurate but the deviations from the older theory of Molière are not great. An approximation to the NSW theory is given which is shown to be essentially indistinguishable from the complete NSW theory for the scattering of medium energy protons and which allows the construction of “universal” angular distribution curves. A method is given which permits the rapid evaluation of the angle at which the angular distribution has decreased to 1/e of its value in the forward direction.

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