Contribution of supercritical states of 3He quasiparticles to the thermodynamics of superfluid solutions
T. N. AntsyginaPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSRV. A. SlyusarevPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSRM. A. Strzhemechnyı̆Physicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR
ABI
Аннотация
Within the framework of a modified Lee model the paper discusses the energy spectrum of 3He excitations in superfluid 4He in the range of momenta close to the critical point at which the 3He excitation decays into a roton and a low-momentum excitation. The thermodynamic potential is reconstructed taking account of the contribution from supercritical states.
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