Temperature dependence of the absorption of fourth sound in He II
N. E. DyuminPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSRÉ. Ya. Rudavskiı̆Physicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR
ABI
Аннотация
In the temperature range 0.4°K–Tλ the temperature dependence of the absorption coefficient of fourth sound in superfluid helium was investigated on the basis of measuring the amplitude of the sound signal. It was demonstrated that the principal contribution to the absorption of fourth sound is made by viscous losses associated with the slippage of the normal components along the channel walls.
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