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Phys. Rev. Lett. 93, 173401 (2004) [4 pages]

Femtosecond Interatomic Coulombic Decay in Free Neon Clusters: Large Lifetime Differences between Surface and Bulk

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G. Öhrwall1,*, M. Tchaplyguine1,2, M. Lundwall1, R. Feifel1,†, H. Bergersen1, T. Rander1, A. Lindblad1, J. Schulz2, S. Peredkov3, S. Barth4, S. Marburger4, U. Hergenhahn4, S. Svensson1, and O. Björneholm1
1Department of Physics, Uppsala University, Box 530, S-751 21 Uppsala, Sweden
2MAX-lab, Lund University, Box 118, SE-221 00 Lund, Sweden
3Institute of Physics, Lund University, Box 118, SE-221 00 Lund, Sweden
4Max-Planck-Institute for Plasma Physics, EURATOM Association, Boltzmannstrasse 2, 85748 Garching, Germany

Received 28 May 2004; published 19 October 2004

A quantitative determination of 2s vacancy lifetimes in surface and bulk atoms of free Ne clusters has been made. While for free atoms the 2s inner-valence hole has a ps lifetime, it reduces to 6±1  fs for cluster bulk atoms. For surface atoms, the lifetime is on average longer than 30 fs. The lifetime estimate was obtained from fits of high-resolution photoelectron spectra of Ne clusters. The shortening of the lifetime is attributed to the coordination dependent interatomic Coulombic decay, which is extremely sensitive to internuclear distances.

© 2004 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.93.173401
DOI:
10.1103/PhysRevLett.93.173401
PACS:
36.40.Cg, 34.50.Gb

*Corresponding author.

Electronic address: gunnar.ohrwall@fysik.uu.se

†Present address: Physical and Theoretical Chemistry Laboratory, Oxford University, South Parks Road, Oxford OX13QZ, United Kingdom.

 
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