  We compute the vibronic spectrum of gas phase fullerene negative ions
C_{60}^{-} and C_{60}^{2-}. We treat accurately the linear dynamical
Jahn-Teller of these ions in their ground state. In particular, coupling of the
t_{1u} orbital to the eight H_g vibrational modes is handled by exact
diagonalizations including up to six vibrons. The resulting spectrum is
characterized by large splittings, which should be readily observable
spectroscopically. The lowest excitation symmetry is argued to be related to
the Berry phase present in this problem.
