PHOTODESTRUCTION CROSS SECTIONS FOR MASS-SELECTED ION CLUSTERS: (CO,);:

The relative photodestruction cross sections for CO * cluster ions, (CO2): (2 =Z II G lo), are reported at 1064,644 and 532 nm. The ion clusters are synthesized by nucleation to the monomer ion in a supersonic expansion, and the parent ions are mass selected both before and after photodissociation with a tandem time-of-fli$r mass specuometer. Models for the observed cluster size dependence of the cross sections are discussed. I