  The theory of collisional depolarization of spectral lines by atomic hydrogen
(Derouich et al. 2003a; Derouich et al. 2003b) is extended to $f$-atomic levels
$(l$=3). Depolarization rates, polarization and population transfer rates are
calculated and results are given. Each cross section as a function of the
effective quantum number for a relative velocity of 10 $\textrm{km s}^{-1}$ is
given together with an exponent $\lambda$, if it exists, on the assumption that
the cross section varies with velocity as $v^{-\lambda}$. A general trends of
depolarization rates, of polarization transfer rates and of population transfer
rates are given. A discussion of our results is achieved.
