Abstract

Numerical calculations show that in order to know the differential cross sections at large angles, an exact evaluation of the single partial wave phase shifts is needed, The theoretical interpretation of measured cross sections raises the problem of giving the partial wave phase shitts by means of a compact analytical form. A direct and simple approach to the problem is presented, making use of a suitable simplilication of the well known W.K.B. method. Electrons are still considered Klein-Gordon particles. (A.C.)

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