# $A^{2}\Pi ^{\sim} X^{2}\Sigma^{+}$ INTERACTION PARAMETERS FOR $^{12}C^{16}O^{+}, ^{13}C^{16}O^{+}$ AND $^{14}C^{16}O^{+}$ FROM DEPERTURBATION ANALYSES OF $A^{2}\Pi(v') X^{2}\Sigma^{+} (v^{\prime \prime})$ BANDS

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 Title: $A^{2}\Pi ^{\sim} X^{2}\Sigma^{+}$ INTERACTION PARAMETERS FOR $^{12}C^{16}O^{+}, ^{13}C^{16}O^{+}$ AND $^{14}C^{16}O^{+}$ FROM DEPERTURBATION ANALYSES OF $A^{2}\Pi(v') X^{2}\Sigma^{+} (v^{\prime \prime})$ BANDS Creators: Coxon, John A.; Kępa, R.; Kocan, A.; Piotrowska-Domagala, I. Issue Date: 2004 Publisher: Ohio State University Abstract: Several $A^{2}\Pi X^{2}\Sigma^{+}$ emission bands of $CO^{+}$, for which the A-state vibrational level is perturbed, have been recorded photographically. The well known $A(v^{\prime} = 0) ^{\sim} X(v^{\ast} = 10)$ and $A(v^{\prime} = 5) ^{\sim} X(v^{\ast} = 14)$ perturbations between the $A^{2}\Pi$ and $X^{2}\Sigma^{+}$ states of $^{12}C^{16}O^{+}$, previously analysed by Coxon and $Foster^{a}$, have been reinvestigated by analysis of the $0 - 2$ and $5 - 0$ bands. The standard deviations of the least squares fits are typically about $0.02 cm^{-1}$. Similarly, the $A(v^{\prime} = 1) ^{\sim} X(v^{\ast} = 11)$ interaction in $^{13}C^{16}O^{+}$, first identified by $Jakubek^{b}$ in an analysis of the $0 - 1$ band of the $B^{2}\Sigma^{+} - A^{2}\Pi$ system, has been studied by a deperturbation analysis of the rotational structure in the $A^{2}\Pi(v^{\prime} = 1) \to X^{2}\Sigma^{+} (v^{\prime \prime} = 0)$ band. For $^{14}C^{16}O^{+}$, the corresponding $A(v^{\prime} = 2) ^{\sim} X(v^{\ast} = 11)$ interaction has been observed for the first time by analysis of the $2 - 0$ and $2 - 1$ bands of the $A - X$ system. The expected isotopic self-consistency of the interaction parameters $\alpha$ and $\beta$ from individual bands of the three isotopomers is discussed. Description: $^{a}$J. A. Coxon and S. C. Foster, J. Mol. Spectrosc. 93, 117 (1982). $^{b}$Z. Jakubek, J. Mol. Spectrosc. 131, 207 (1988). Author Institution: Department of Chemistry, Dalhousie University; Atomic and Molecular Physics Laboratory, Institute of Physics, Univerity of Rzesz\'{o}w URI: http://hdl.handle.net/1811/21285 Other Identifiers: 2004-RE-01