  Three C60 fragmentation regimes in fullerite bombarded by Cs+ are identified
as a function of its energy. C2 is the major species sputtered at all energies.
For E(Cs+) < 1 keV C2 emissions dominate. C2 and C1 have highest intensities
between 1 and 3 keV with increasing contributions from C3 and C4. Intensities
of all fragments maximize around 2 keV. Above 3 keV, fragments densities
stabilize. The roles of and the contributions from direct recoils and collision
cascades are determined. Maximum direct recoil energy delivered to the C60
fullerite cage is 210 eV at which only C2 emissions occur is identified and an
explanation provided. The three fragmentation regimes under continued Cs+
bombardment eventually lead to complete destruction of the C60 cages
transforming fullerite into amorphous carbon
