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Published on: August 22, 2017
Femtosecond interatomic Coulombic decay in free neon clusters: large lifetime differences between surface and bulk
G Ohrwall1, M Tchaplyguine, M Lundwall
1Department of Physics, Uppsala University, Box 530, S-751 21 Uppsala, Sweden. gunnar.ohrwall@fysik.uu.se
Abstract:
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.
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