ULTRASONIC ATTENUATION NEAR THE LAMBDA LINE OF 4He UNDER PRESSURE

A. Ikushima , K. Okamoto

Ultrasonic attenuation was measured near the lambda line of 4He under pressure, extending the work of Carey et al. below 1 MHz to higher frequencies up to 90 MHz. The behaviours of the relaxation time for the attenuation peak cannot be explained by the Pokrovskii-Khalatnikov theory. The dynamic scaling hypothesis seems to work also well under pressure.

Domaines: Articles anciens

A. Ikushima, K. Okamoto. ULTRASONIC ATTENUATION NEAR THE LAMBDA LINE OF 4He UNDER PRESSURE. Journal de Physique Colloques, 1978, 39 (C6), pp.C6-188-C6-189. ⟨10.1051/jphyscol:1978683⟩. ⟨jpa-00218363⟩