A reanalysis of the k3π state of CO

Berden, Giel; Jongma, Rienk T.; van der Zande, Dorien; Meijer, Gerard

doi:10.1063/1.475031

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A reanalysis of the k³π state of CO

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Berden, G., Jongma, R. T., van der Zande, D., & Meijer, G. (1997). A reanalysis of the k³π state of CO. The Journal of Chemical Physics, 107(20), 8303-8310. doi:10.1063/1.475031.

Cite as: https://hdl.handle.net/21.11116/0000-000B-643D-1

Abstract

The k³π state of the CO molecule is investigated in the region between 91 000 and 97 000 cm⁻¹ via 1+1 resonance enhanced multiphoton ionization spectroscopy on CO molecules prepared in a single quantum level of the a³π(v=1) state. A new vibronic band is found which is at lower energy than the vibrational ground state reported in the literature, leading to a reassignment of the vibrational numbering of the k³π state. The rotationally resolved spectra of the k³π (v=0–6)←a³π(v=1, J=1, Ω=1) of ¹²CO and ¹³CO have been observed and analyzed, confirming the new vibrational labeling and providing a full set of molecular constants of the k³π valence state.