FEMTOSECOND DYNAMICS OF ADSORBATE CHARGE-TRANSFER PROCESSES

In this paper, experimental results on the (sub)-femtosecond dynamics of adsorbate-substrate charge transfer processes are reported. A new m ethod to study such phenomena by a combination of high-resolution exci tation and decay spectroscopy of adsorbate core resonances is presente d. The results were obtained by using the enhanced capabilities regard ing high-resolution soft X-ray spectroscopy offered by third generatio n synchrotron sources. Timescales for charge transfer processes for ph ysisorbed and chemisorbed adsorbates are derived and compared to expec tations from resonance lineprofiles.