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It is shown that the peak structure observed in angle-resolved photoelectronspectra of metallic deposits can only be unambiguously associated to singleelectronic states if the deposit has a two dimensional character (finite alongone spatial direction). In one and zero dimensions the density of states showspeaks related to bunches of single electron states (the finer structureassociated to the latter may not always be experimentally resolved). Thecharacteristics of the peak structure strongly depend on the band dispersion inthe energy region where they appear. Results for the density of states andphotoemission yield for Ag crystallites on GaAs(110) are presented and comparedwith experimental photoelectron spectra.Comment: Uuencoded gz-compressed postcript file including text and three  figures; Send comments to jav@boston.icmm.csic.e

Dimensional effects in photoelectron spectra of Ag deposits on GaAs(110) surfaces