Excitations in Dilute 3He–4He Mixtures
The energy spectrum of elementary excitations in dilute He3-He4 mixtures is investigated using a Feynman type of wave function. It is found that the He3 energy spectrum lies below the phonon-roton energy spectrum and exhibits a minimum near the roton minimum. Reinterpretation of their experimental results by Sobolev and Esel’son confirms this description of the He3 spectrum. Some consequences of this spectrum are discussed.
KeywordsWave Function Energy Spectrum Elementary Excitation Dynamic Structure Factor Small Wave Vector
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