Sub-natural-width angle-resolved resonant Auger electron spectroscopy of atoms and molecules on the high resolution soft X-ray monochromator at SPring-8

We have installed a high-resolution electron spectroscopy apparatus on the soft X-ray beamline BL27SU at SPring-8 and started the sub-natural-width an gle-resolved resonant Auger spectroscopy of atoms and molecules. We demonst rate that the sub-natural-width spectroscopy is a powerful tool both for sp ectroscopic investigation of the Auger final states and for investigation o f the nuclear motion dynamics in the core-excited molecules, presenting som e results for the Ne 1s --> 3p excitation and for the C and O 1s excitation s of CO2 to the lowest unoccupied molecular orbital 2 pi (u). (C) 2001 Else vier Science B.V. All rights reserved.