Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 19, Issue 30, Pages 19733-19739Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7cp01812f
Keywords
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Funding
- FERMI team
- DESY
- Deutsche Forschungsgemeinschaft (DFG) through the excellence cluster The Hamburg Center for Ultrafast Imaging-Structure, Dynamics and Control of Matter at the Atomic Scale'' (CUI) [EXC1074]
- priority program Quantum Dynamics in Tailored Intense Fields'' (QUTIF) [SPP1840]
- European Research Council through COMOTION [ERC-Kupper-614507]
- Helmholtz Association Initiative and Networking Fund''
- ERC Starting Research Grant UDYNI [307964]
- European Research Council (ERC) [307964] Funding Source: European Research Council (ERC)
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We demonstrate the experimental realization of impulsive alignment of carbonyl sulfide (OCS) molecules at the Low Density Matter Beamline (LDM) at the free-electron laser FERMI. OCS molecules in a molecular beam were impulsively aligned using 200 fs pulses from a near-infrared laser. The alignment was probed through time-delayed ionization above the sulphur 2p edge, resulting in multiple ionization via Auger decay and subsequent Coulomb explosion of the molecules. The ionic fragments were collected using a time-of-flight mass spectrometer and the analysis of ion-ion covariance maps confirmed the correlation between fragments after Coulomb explosion. The analysis of the CO+ and S+ channels allowed us to extract the rotational dynamics, which is in agreement with our theoretical description as well as with previous experiments. This result opens the way for a new class of experiments at LDM within the field of coherent control of molecules with the possibilities that a precisely synchronized optical-pump XUV-probe laser setup like FERMI can offer.
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