Four and three-phonon scattering in isotropic superfluid helium von Adamenko, I.N., Kitsenko, Yu.A., Nemchenko, K.E., Wyatt, A.F.G.

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Three-phonon relaxation in isotropic and anisotropic phonon systems of liquid helium at different pressures von Adamenko, I.N., Kitsenko, Yu.A., Nemchenko, K.E., Slipko, V.A., Wyatt, A.F.G.

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Creation of high-energy phonons by four-phonon processes in anisotropic phonon systems of He II von Adamenko, I.N., Kitsenko, Yu.A., Nemchenko, K.E., Slipko, V.A., Wyatt, A.F.G.

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