Nishikawa M.; Yoshino K.; Abe S.; Suzuki H.; Matsumoto K.; Tayurskii D.; Tajiri K.
(2005)
Acoustic properties have been studied in 4He-aerogel system. The longitudinal ultrasound velocity and attenuation have been measured in 92.6 and 94.0% porous aerogels at elevating pressures from the saturated vapor pressure ...