Adamenko, I.N.; Kitsenko, Yu.A.; Nemchenko, K.E.; Slipko, V.A.; Wyatt, A.F.G.
(Физика низких температур, 2007)
The problem of the creation of high-energy phonons (h-phonons) by a pulse of low-energy phonons
(l-phonons) moving from a heater to a detector in superfluid helium, is solved. The rate of h-phonon creation
is obtained ...