Dynamic Structure Function of 3He-4He Mixtures in the Deep Inelastic Regime
First results of deep inelastic neutron scattering on 3He-4He mixtures have been recently reported.1 The measured dynamic structure function, S (q, w), seems to reveal a strong enhancement of the condensate fraction, no, of the 4He component with respect to the pure phase, while the 3He and 4He kinetic energies appear to be of the same order of the ones in the pure phases.1 Both facts are in contrast with recent microscopic calculations of the momentum distributions for the mixtures.2 Therefore, theoretical investigations of the dynamic structure function and further analysis of the measured S (q, w) are well justified.
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