  The temperature dependence of optical excitation life-time, Gamma, and
transition energies, E_ii, were measured for bucky-papers of single-wall carbon
nanotubes (SWCNTs) and inner tubes in double-wall carbon nanotubes (DWCNTs)
using resonant Raman scattering. The temperature dependence of Gamma and E_ii
is the same for both types of samples and is independent of tube chirality. The
data proves that electron-phonon interaction is responsible for temperature
dependence of E_ii(T). The temperature independent inhomogeneous contribution
to Gamma is much larger in the SWCNT samples, which is explained by the
different SWCNT environment in the two types of samples. Gamma of the inner
tubes for the bucky-paper DWCNT sample is as low as \sim 30 meV, which is
comparable to that found for individual SWCNTs.
