First sound absorption in liquid 3He under pressure
N. E. DyuminPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSRB.N. Esel'sonPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR
ABI
Аннотация
The first sound absorption coefficient has been measured in liquid 3He in the temperature interval 1.4–2.1 °K under pressures up to 20.0 atm at frequencies f = ω/2π = 13.55, 18.96, and 24.40 MHz. It is shown that the sound absorption in the studied temperature and pressure region may be described within a hydrodynamic framework in which the absorption coefficient is independent of pressure in the liquid.
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