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Heat capacity of3He/4He mixtures (1988)

Owers-Bradley, J. R. ; Main, P. C. ; Bowley, R. M. ; [et al.]

Springer

Journal of low temperature physics 72 (1988), S. 201-212

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ISSN: 1573-7357

Source: Springer Online Journal Archives 1860-2000

Topics: Physics

Notes: Abstract 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 ε=ħ2 k 2(1+γk 2)/2m*, the fits yield the value of γ and the effective mass m* of each mixture. The average value of γ is −0.076±0.01 A2 and the effective mass in the limit of zero concentration is (2.23±0.02)m 3. These are compared to values deduced from other measurements.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00682096

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