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# THE $\widetilde{A}^{1}A^{\prime \prime}$ EXCITED ELECTRONIC STATE OF HCN: ISOTOPIC EVIDENCE THAT UNIFIES EXPERIMENT AND THEORY

Please use this identifier to cite or link to this item: http://hdl.handle.net/1811/16724

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 Title: THE $\widetilde{A}^{1}A^{\prime \prime}$ EXCITED ELECTRONIC STATE OF HCN: ISOTOPIC EVIDENCE THAT UNIFIES EXPERIMENT AND THEORY Creators: Bickel, G. A.; Innes, K. K. Issue Date: 1984 Abstract: High resolution vacuum ultraviolet absorption spectra of $D^{13}CN$ and $DC^{15}N$ are photographed, especially for comparison with the so called $\beta$-X system, observed previously only for $DCN.^{1}$ Isotopic shifts establish the absolute vibrational numbering for this system yielding its assignment to the $\widetilde{A}^{1}A^{\prime \prime}-\widetilde{X}^{1}\Sigma^{+}$ transition. The measured bands between 53200 and $65100 cm^{-1}$ are thereby accommodated by a single electronic transition as predicted by $theory.^{2}$ New vibrational constants of the $^{1}A^{\prime \prime}$ state are presented for DCN as well as for the two heavier isotopes. URI: http://hdl.handle.net/1811/16724 Other Identifiers: 1984-RF-1