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Issue 42, 2011
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Stark-selected beam of ground-state OCS molecules characterized by revivals of impulsive alignment

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Abstract

We make use of an inhomogeneous electrostatic dipole field to impart a quantum-state-dependent deflection to a pulsed beam of OCS molecules, and show that those molecules residing in the absolute ground state, X1Σ+, |0000〉, J = 0, can be separated out by selecting the most deflected part of the molecular beam. Past the deflector, we irradiate the molecular beam by a linearly polarized pulsed nonresonant laser beam that impulsively aligns the OCS molecules. Their alignment, monitored via velocity-map imaging, is measured as a function of time, and the time dependence of the alignment is used to determine the quantum state composition of the beam. We find significant enhancements of the alignment (〈cos2θ2D〉 = 0.84) and of state purity (>92%) for a state-selected, deflected beam compared with an undeflected beam.

Graphical abstract: Stark-selected beam of ground-state OCS molecules characterized by revivals of impulsive alignment

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Publication details

The article was received on 12 Apr 2011, accepted on 04 Jul 2011 and first published on 01 Aug 2011


Article type: Paper
DOI: 10.1039/C1CP21143A
Citation: Phys. Chem. Chem. Phys., 2011,13, 18971-18975
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    Stark-selected beam of ground-state OCS molecules characterized by revivals of impulsive alignment

    J. H. Nielsen, P. Simesen, C. Z. Bisgaard, H. Stapelfeldt, F. Filsinger, B. Friedrich, G. Meijer and J. Küpper, Phys. Chem. Chem. Phys., 2011, 13, 18971
    DOI: 10.1039/C1CP21143A

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