The extreme ultraviolet emission spectrum of CO produced by electron impact at 20 and 200 eV

Abstract

In this first part of a laboratory study of predissociation in CO the authors have measured in the electron-impact-induced fluorescence spectrum of CO in the wavelength range 40-125 nm at a spectral resolution of 0.5 nm. The experiment was performed in a crossed-beam configuration under optically thin conditions. Their spectral measurements at 200 eV electron impact, energy provide the emission cross sections of atomic dissociation fragments (C I, C II, O I, O II) and the vibrational transitions of the B 1 Sigma +, C 1 Sigma +, E 1 Pi -X 1 Sigma + band systems of CO. The measured emission cross sections of these molecular transitions will be needed for comparison with excitation cross sections from electron energy-loss spectra to determine predissociation yields.