title: Electronic spectroscopy of the HCCN radical.
abstract: The Ã(3)A"-X̃(3)Σ(-) electronic transition of the HCCN∕DCCN radical was observed by laser-induced fluorescence spectroscopy. Rotationally resolved excitation spectra were observed for HCCN and DCCN, and effective molecular constants of the upper state were determined. The observed intensities of the rotational lines were anomalous, probably due to a level-dependent non-radiative decay process in the excited state. Fluorescence depletion spectroscopy was applied in order to observe non-fluorescent vibronic levels. A dispersed fluorescence spectrum was also observed to determine the vibrational level structure in the ground electronic state. The observed vibrational structures in the fluorescence depletion and dispersed fluorescence spectra were tentatively assigned based on the results of ab initio calculations.
authors: Department of Basic Science, Graduate School of Arts and Sciences, The University of Tokyo, Tokyo, Japan.
authors: Masakazu
authors: M
authors: Nakajima
authors: Hitomi
authors: H
authors: Toyoshima
authors: Shigenori
authors: S
authors: Sato
authors: Kazunori
authors: K
authors: Tanaka
authors: Kennosuke
authors: K
authors: Hoshina
authors: Hiroshi
authors: H
authors: Kohguchi
authors: Yoshihiro
authors: Y
authors: Sumiyoshi
authors: Yasuhiro
authors: Y
authors: Ohshima
authors: Yasuki
authors: Y
authors: Endo
mesh_terms: D005609:Free Radicals / Q000737:chemistry; D009570:Nitriles / Q000737:chemistry*; D011789:Quantum Theory; D013057:Spectrum Analysis
chemical_list: D005609:Free Radicals; D009570:Nitriles