K. Gokhberg et al 2005 Europhys. Lett. 72 228 doi:10.1209/epl/i2005-10227-7
K. Gokhberg1, A. B. Trofimov2, T. Sommerfeld3 and L. S. Cederbaum1
Show affiliationsA new relaxation pathway of optically allowed valence-excitations in molecules bound to metal atoms was investigated. We show that the σnonπ* excitation of HCN in MgnHCN (n = 1,2) clusters decays through the emission of an electron from the metallic component. The calculated lifetimes are of the order of 140 fs for MgHCN and 25 fs for Mg2HCN. These short lifetimes suggest that the relaxation mechanism discussed here should dominate for molecules adsorbed on metal clusters or surfaces. We find that at large distances this decay is dominated by energy transfer.
Issue 2 (October 2005)
Received 30 June 2005, accepted for publication 18 August 2005, in final form 18 August 2005
Published 14 September 2005
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