ENERGETICS OF C-16(-36(+) PHOTODISSOCIATION() TO C)

Photofragmentation of mass-selected C-16(+) to C-36(+) clusters is inv estigated at two laser wavelengths: 532 and 355 nm. The depletion depe ndence on laser fluence leads to the number of absorbed photons, toget her with the photoabsorption cross section. From the knowledge of the internal energy deposited in the clusters before the fragmentation ste p, the dissociation energies are deduced. Clusters C-16(+) to C-29(+) are found to be less and less stable, whereas above C-30(+) an increas ed stability is observed.