Partial Cross Sections and Density of States Effects in the Valence Band Photoemission from Solid Nitrogen

摘要

Photoelectron energy distribution curves from solid nitrogen have been measured for excitation energies ranging from threshold (14.2 eV) to 40 eV using Synchrotron Radiation. The partial cross sections for the emission from the 3sigmasub(g), 1 pi sub(u) and 2sigmasub(u) derived valence bands show pronounced maxima 3.4 eV, 2.9 eV and 3.0 eV above the vacuum level respectively which we interpret as being due to a high density of conduction band final states. These states are closely related to the pi sub(g)* negative-ion shape resonance for molecular nitrogen. (ERA citation 08:012732)