Spectral variation of molecular photoelectron angular distributions: valence shells of N2and CO

Abstract

Photoelectron angular distributions have been calculated, with the multiple-scattering method, for electrons ejected from the outer shells 2 sigma _u, 1 pi _u and 3 sigma _g of N₂ and 4 sigma , 1 pi and 5 sigma of CO from threshold to 10 Ryd electron kinetic energy. Clear evidence of the sigma f wave (l=3) shape resonance is seen in the 3 sigma _g spectrum of N₂ and in all three spectra of CO. Agreement with very recent wavelength-dependent measurements made at the Bonn synchrotron by Marr and Holmes (1979) is generally good, but more detailed measurements and further theoretical work are needed to eliminate the remaining discrepancies.