  We employed our recent model of the cosmic-ray (CR) halo to compute the
Galactic spectra of stable and unstable secondary nuclei. In this model,
confinement of the Galactic CRs is entirely determined by the self-generated
Alfvenic turbulence whose spectrum is controlled by nonlinear Landau damping.
We analyzed the physical parameters affecting propagation characteristics of
CRs and estimated the best set of free parameters providing accurate
description of available observational data. We also show that agreement with
observations at lower energies may be further improved by taking into account
the effect of ion-neutral damping that operates near the Galactic disk.
