HIGH-RESOLUTION STUDY OF RESONANT DECAY FOLLOWING THE O 1S-]PI-ASTERISK EXCITATION(S) IN CO2 - EVIDENCE FOR AN OVERLAPPING RYDBERG TRANSITION

摘要

Electronic decay spectra associated with the O Is --> 2 pi(u) (pi*) transition(s) in CO2 have been measured at several photon energies within the width of the primary excitation. Significant differences in the shape and relative intensity of the decay features allow the high-energy shoulder evident on the pi* absorption band to be identified as an overlapping Rydberg transition. This method requires the availability of a photon source with a very narrow bandwidth at the O K-edge. (C) 1997 Elsevier Science B.V. [References: 14]