1973•Physical Review LettersRequires access

Elementary excitations in $sup 3$He--$sup 4$He mixtures

M. J. Stephen, Laurence Mittag

Abstract

The energy spectrum of elementary excitations in dilute He/sup 3/-He/sup 4/ mixtures is investigated using a Feynrnan type of wave function. It is found that the He/sup 3/ energy spectrum lies below the phonon-roton energy spectrum and exhibits a minimum near the roton minimum. Some consequences of this energy spectrum are discussed. (auth)

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Key concepts: Roton, Helium-4, Physics, Isotopes of helium, Atomic physics, Energy (signal processing), Energy spectrum, Helium-3