High-momentum dynamic structure function of liquid 3He-4He mixtures: a microscopic approach

Abstract

The high-momentum dynamic structure function of liquid 3He-4He mixtures has been studied introducing final state effects. Corrections to the impulse approximation have been included using a generalized Gersch-Rodriguez theory that properly takes into account the Fermi statistics of 3He atoms. The microscopic inputs, as the momentum distributions and the two-body density matrices, correspond to a variational (fermi)-hypernetted chain calculation. The agreement with experimental data obtained at $q=23.1$ Å${}^{-1}$ is not completely satisfactory, the comparison being difficult due to inconsistencies present in the scattering measurements. The significant differences between the experimental determinations of the 4He condensate fraction and the 3He kinetic energy, and the theoretical results, still remain unsolved.

18 pages, 11 figures, to appear in Phys. Rev. B

References in corpus (5)

• Progress in Monte Carlo calculations of Fermi systems: normal liquid 3He
• A Quantum Monte Carlo Study of Static Properties of One 3He Atom in Superfluid 4He
• Description of recent large-$q$ neutron inclusive scattering data from liquid ${}^4$He
• Momentum distributions in ^3He-^4He liquid mixtures
• Final State Effects in the high q response of ${}^3$He-${}^4$He mixtures

Cited by in corpus (2)

• High momentum response of liquid 3He
• Kinetic energy of He atoms in liquid ${}^4$He-${}^3$He mixtures