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J Chem Phys. 2012 Jun 7;136(21):214201. doi: 10.1063/1.4722090.

Production of a beam of highly vibrationally excited CO using perturbations.

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1
Institute for Physical Chemistry, Georg August University of Göttingen, Tammanstraße 6, 37077 Göttingen, Germany.

Abstract

An intense molecular beam of CO (X(1)Σ(+)) in high vibrational states (v = 17, 18) was produced by a new approach that we call PUMP - PUMP - PERTURB and DUMP. The basic idea is to access high vibrational states of CO e(3)Σ(-) via a two-photon doubly resonant transition that is perturbed by the A(1)Π state. DUMP -ing from this mixed (predominantly triplet) state allows access to high vibrational levels of CO (X(1)Σ(+)). The success of the approach, which avoids the use of vacuum UV radiation in any of the excitation steps, is proven by laser induced fluorescence and resonance enhanced multi-photon ionization spectroscopy.

PMID:
22697536
DOI:
10.1063/1.4722090
[Indexed for MEDLINE]
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