ARGON CLUSTER SCATTERING FROM A GRAPHITE SURFACE

Experimental results from the scattering of argon clusters off a graphite surface are presented. Angular distributions of cluster fragments have been recorded at monomer, dimer and trimer masses. While some of our findings are similar to previous observations and can be interpreted in the framework of existing theories, two distinctly new features have been seen: first, the angular distributions of the scattered fragments are clearly correlated with their masses; and second, a new grazing exit angle component appears for sufficiently large incident angles or backing pressures, which is interpreted as evidence of large cluster fragments surviving the surface collision.