Two-photon resonant excitation of interatomic coulombic decay in neon dimers
The recent availability of intense and ultrashort extreme ultraviolet sources opens the possibility to investigate ultrafast electronic relaxation processes in matter in an unprecedented regime. In this work we report on the observation of two-photon excitation of interatomic Coulombic decay (ICD) i...
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Zusammenfassung: | The recent availability of intense and ultrashort extreme ultraviolet sources
opens the possibility to investigate ultrafast electronic relaxation processes
in matter in an unprecedented regime. In this work we report on the observation
of two-photon excitation of interatomic Coulombic decay (ICD) in neon dimers
using the tunable intense pulses delivered by the free electron laser
FERMI@Elettra. The unique characteristics of FERMI (narrow bandwidth, spectral
stability, and tunability) allow one to resonantly excite specific ionization
pathways and to observe a clear signature of the ICD mechanism in the ratio of
the ion yield created by Coulomb explosion. The present experimental results
are explained by \emph{ab initio} electronic structure and nuclear dynamics
calculations. |
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DOI: | 10.48550/arxiv.1902.10137 |