  We demonstrate the new specific phenomenon of the long-time resonant energy
exchange in the carbon nanotubes (CNTs) with the radial breathing mode as a
carrier. This process turns out to be stable in the wide range of the
excitation energy. It is shown that the modified nonlinear Schr\"odinger
equation, obtained in the framework of nonlinear elastic thin shell theory,
describes the CNT nonlinear dynamics in the considered frequency band. The
numerical integration of the thin shell theory equations confirms the results
of the analytical study.
