The Scattering of Elementary Particles by Complex Nuclei—A Generalization of the Impulse Approximation

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Abstract
By a systematic iteration procedure it is shown how the problem of the scattering of an elementary particle by a complex nucleus (or any many-particle target system) can be expressed in terms of two-body operators. The results are related to the previous work of Chew and Wick on the impulse approximation, with special attention given to multiple scattering effects which have heretofore not been formulated in a rigorous way. An explicit formula for the double scattering terms is presented.