Measurement of the boundary frequency of the inertial interval of capillary wave turbulence at the surface of liquid hydrogen

The boundary frequency was experimentally measured for the upper edge of an inertial interval corresponding to the Kolmogorov spectrum for energy distribution over the oscillation frequencies at the surface of liquid hydrogen. It is shown that the dependence of boundary frequency $\omega_b$ on the wave amplitude $\eta_p$ at the pump frequency $\omega_p$ is well described by the power law $\omega _b\sim\eta _p^{4/3}\omega _p^{23/9}$