Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 13, Issue 42, Pages 18971-18975Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c1cp21143a
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Funding
- Lundbeck Foundation
- Carlsberg Foundation
- Danish Council for Independent Research
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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, X-1 Sigma(+), |00(0)0 >, 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 (< cos(2) theta(2D)> = 0.84) and of state purity (> 92%) for a state-selected, deflected beam compared with an undeflected beam.
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