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Experimental measurements of the attenuation of second sound in ultra dilute 3He4He mixtures

✍ Scribed by J.R. Smith; A. Tyler

Publisher
Elsevier Science
Year
1990
Tongue
English
Weight
155 KB
Volume
165-166
Category
Article
ISSN
0921-4526

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✦ Synopsis

We report measurements of the damping of second sound for concentrations of 0.1, 0.05, 0.01 and 0.001% 3He in 4He. These measurements were performed in the temperature range O.lK to 1K and in the frequency range 1kHz to 6kHz.

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✍ H.C.M. Van Der Zeeuw; R.F. Mudde; H. Van Beelen 📂 Article 📅 1986 🏛 Elsevier Science ⚖ 876 KB

An alternative way of measuring the specific heat of superttuid 4He and dilute 3He-4He mixtures is described. Specific heat data are derived from the measured resonance curves for the temperature amplitude in a second-sound Helmholtz resonator. It is shown that the nature of the losses that govern t