Multiphoton induced fluorescence and ionization of carbon monoxide (B 1Σ+)
- 1 July 1983
- journal article
- research article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 79 (1), 196-202
- https://doi.org/10.1063/1.445556
Abstract
The B 1Σ+ state of carbon monoxide was created by a two-photon absorption of 230 nm laser radiation. The B 1Σ+ state was identified by the positions of the Q branch 0–0 absorption band and the vibrational bands of B 1Σ+ → A 1Π fluorescence occurring after excitation. Collision-induced b 3Σ+ → a 3Π emission in the 350 nm region was also observed. The lifetimes of the B 1Σ+ → A 1Π and the b 3Σ+ → a 3Π emission were obtained as well as the self-quenching rate constants and the CO (B 1Σ)) quenching rate by N2. In addition to the two-photon laser induced fluorescence of B 1Σ+ carbon monoxide, a three-photon resonant (2+1) ionization was observed. Laser power dependence studies indicate that ionization of the B 1Σ+ state was nearly saturated at the laser fluence used, implying that most CO (B 1Σ+) was ionized rather than fluorescing. The measured polarization ratios for circularly to linearly polarized excitation of fluorescence and ionization was much larger than the expected values suggesting that other three-photon processes are occurring and occur more efficiently for linear polarization.Keywords
This publication has 25 references indexed in Scilit:
- Two-photon excitation of thelevel in H and D atomsPhysical Review A, 1981
- ʌ-type doubling and spin-rotation splitting of NO, measured in simultaneous one- and two-photon laser spectroscopyOptics Communications, 1978
- Two photon excitation of CO (A 1Π) and N2 (a 1Πg)Optics Communications, 1977
- Three-Photon Excitation of Xenon and Carbon MonoxidePhysical Review Letters, 1977
- High resolution two-photon spectroscopy in the 1B2u state of benzeneThe Journal of Chemical Physics, 1976
- Measured lifetimes of the two vibrational levels of the b3Σ+state of COJournal of Physics B: Atomic and Molecular Physics, 1973
- Determination of the transition moment of the B1Σ+-X1Σ+transition in COJournal of Physics B: Atomic and Molecular Physics, 1972
- Radiative Lifetime of the B^1∑^+ State of CO*Journal of the Optical Society of America, 1970
- Study of Some Electronic Transition Probabilities in CO and CNThe Journal of Chemical Physics, 1968
- Transition Probabilities for H2, D2, N2, N2+, and COThe Journal of Chemical Physics, 1966