A new scaling variable is proposed for investigation of deep inelastic neutron scattering from quantum liquids and solids. The method improves the usual impulse approximation, accounting for a shift of the quasielastic peak with respect to the free recoil energy ²{q}²$/2m and for an asymmetric behavior of the wings in the dynamic structure function. The approach is successfully employed to investigate the experimental data in liquid $⁴He$ at q=10 A${{}}^{{{-}}1}$.
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S. Stringari (1987) studied this question.
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