Production of a beam of highly vibrationally excited CO using perturbations.
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.
Institute for Physical Chemistry, Georg August University of Göttingen, Tammanstraße 6, 37077 Göttingen, Germany.
Nils
N
Bartels
Tim
T
Schäfer
Jens
J
Hühnert
Robert W
RW
Field
Alec M
AM
Wodtke
D002248:Carbon Monoxide / Q000737:chemistry*; D011789:Quantum Theory; D014732:Vibration
D002248:Carbon Monoxide