Laser-induced electronic transitions in a molecular beam: The dipole moment of d 3Δi i v=4 carbon monoxide

Abstract

Measurement of the Stark effect in the CO transition a ³Πv=0→d ³Δ_iv=4 is made using a tunable dye laser as resonance radiation in a Rabi‐type molecular beam electric resonance spectrometer. The observed spectral linewidths are 4 MHz (FWHM). The electric dipole moment of CO d³Δ_iv=4 is 0.42±0.02 D. The sign of the moment is determined to be C⁻O⁺.