Chung-ln Um; Soo-Young Lee; George, T.F.; Pandey, L.N.; Adamenko, I.N.
(Физика низких температур, 1997)
Through a treatment of three-phonon processes, the wide-angle scattering rates and the absorption rates of phonons, which characterize viscosity and ultrasonic attenuation, respectively, are calculated for ⁴He below 0.6 ...