The A ˜ 1Π u, 0 1 1 (Δ u) vibrational level of C 3

• Published in: Journal of molecular spectroscopy Vol. 267; no. 1; pp. 169 - 171
• Main Authors: Chen, K.-S., Zhang, G., Merer, A.J., Hsu, Y.-C., Chen, W.-J.
• Format: Journal Article
• Language: English
• Published: Elsevier Inc 2011
• Subjects: Comet system; Electronic spectrum; New vibrational band; Triatomic carbon; Triatomic carbon; Comet system; Electronic spectrum; New vibrational band
• ISSN: 0022-2852; 1096-083X
• DOI: 10.1016/j.jms.2011.03.011

The central part of the 0 1 1 (Δ u)–0 1 1 (Π g) band of the A ˜ 1Π u– X ˜ 1∑ + g system of C 3. Some R lines of the 1 2 – 1 – 1 0 1 band lie in among its Q branch. [Display omitted] ► New vibrational band of C 3 found by laser-induced fluorescence. ► Its vibrational assignment is A ˜ 1Π u, 0 1 1 (Δ u)– X ˜ 1 Σ g + , 0 1 1 (Π g). ► 17 of the 19 lowest A ˜ 1Π u state vibrational levels have now been identified. A new band at 23 390 cm −1 in the A ˜ 1Π u– X ˜ 1 Σ g + electronic transition of C 3 has been recorded by laser-induced fluorescence at high resolution and rotationally analyzed. Based on the agreement of the lower state constants with infra-red data given by Kawaguchi et al. [9], the vibrational assignment is found to be 0 1 1(Δ u)–0 1 1 (Π g). Seventeen of the 19 vibronic levels of the A ˜ 1Π u state expected to lie below 25 700 cm −1 (a vibrational energy of 1025 cm −1) have now been identified.