Autor:	Owers-Bradley, J. R., Main, P. C., Bowley, R. M., Batey, G. J., Church, R. J.
Zdroj:	Journal of Low Temperature Physics; August 1988, Vol. 72 Issue: 3-4 p201-212, 12p
Abstrakt:	We measured the specific heat capacity of three dilute mixtures (2.6, 1.07, and 0.44%) of³He in⁴He and of pure⁴He. The⁴He contribution to the specific heat of the mixture is subtracted, leaving only the³He part. This is fitted to a theoretical expression over the whole temperature range from 10 to 700 mK. Assuming a dispersion relation of the form e=h²k²(1+?k²)/2m, the fits yield the value of ? and the effective mass m of each mixture. The average value of ? is -0.076±0.01 A² and the effective mass in the limit of zero concentration is (2.23±0.02)m3. These are compared to values deduced from other measurements.
Databáze:	Supplemental Index
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