Published in
American Physical Society, Physical Review Letters, 9(111)
DOI: 10.1103/physrevlett.111.093402
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Time-Resolved Measurement of Interatomic Coulombic Decay inNe2
,
L. Foucar,
G. Schmid,
A. Broska,
T. Pfeifer,
K. Meyer,
D. Anielski,
R. Boll,
D. Rolles,
M. Kübel ,
M. F. Kling,
Y. H. Jiang
and other authors.
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Abstract
The lifetime of interatomic Coulombic decay (ICD) [L. S. Cederbaum et al., Phys. Rev. Lett. 79, 4778 (1997)] in Ne_2 is determined via an extreme ultraviolet pump-probe experiment at the Free-Electron Laser in Hamburg. The pump pulse creates a 2s inner-shell vacancy in one of the two Ne atoms, whereupon the ionized dimer undergoes ICD resulting in a repulsive Ne^{+}(2p^{-1}) - Ne^{+}(2p^{-1}) state, which is probed with a second pulse, removing a further electron. The yield of coincident Ne^{+} - Ne^{2+} pairs is recorded as a function of the pump-probe delay, allowing us to deduce the ICD lifetime of the Ne_{2}^{+}(2s^{-1}) state to be (150 +/- 50) fs in agreement with quantum calculations. ; Comment: 5 pages, 3 figures, accepted by PRL on July 11th, 2013