Abstract

In the present study the IR spectra of medium large argon clusters (n ≃ 10³) seeded with one (or two) Chromophors molecules are contrasted with the spectra of neat argon clusters that have passed through a crossbeam of the same Chromophore and have picked up one (or two) molecuie(s) on the duster’s surface. The spectra are obtained by crossing the cluster beam downstream from the pickup point with the output of a line tunable CO₂ (or an isotopically substituted CO₂) laser and detecting the evaporated fragment with a bolometer positioned off the beam axis.¹ Once the surface absorption lines of both Chromophore monomer and dimer are recognized and assigned, spectra are obtained as a function of the density of the pickup gas in the scattering region.

© 1989 Optical Society of America