Zadorozhko, A.A.; Chagovets, V.K.; Rudavskii, E.Ya.; Sheshin, G.A.; Kekutia, Sh.E.; Chkhaidze, N.D.; Mulders, N.
(Физика низких температур, 2009)
The velocity of fast and slow collective modes of 90, 94 and 98% porosity aerogels filled with superfluid helium were measured by means of low-frequency resonant technique at temperatures 0.5–2.5 K. The temperature dependences ...