Scaling of the dynamic structure factor at high momentum transfer is established by using time-ordered perturbation theory. Whereas the scaling function is the longitudinal momentum distribution for systems interacting with smooth two-body potentials, additional terms contribute in the case of strong short-range repulsion. Illustrative results are presented for a hard-sphere Bose gas and the relevance to electron scattering from nuclei and neutron scattering from liquid helium is discussed.
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Weinstein et al. (1982) studied this question.
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