Bestimmung effektiver Massen von "3He-Quasiteilchen in verduennten "3He/"4He-Mischungen mittels Tiefsttemperaturkalorimetrie

Dilute solutions of "3He in superfluid "4He have been investigated by accurate masurements of the specific heat capacity C_V for the following parameters: Temperature: 20 mK<T<200 mK; "3He-concentration: 1.3%<x_3<9.5%; Pressure: 0 bar, 10 bar and 20 bar. The data could be fitted to an expression which describes the specific heat capacity of an ideal Fermi gas, yielding the Fermi temperature T_f, the precise "3He-concentration in the cell and the effective mass m* of the "3He-quasiparticles. (orig.)50 refs.Available from TIB Hannover: RA 831(3033) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman