title: High-Resolution Study of the A2A' --> X2A" Transition of HO2: Analysis of the 000-000 Band
abstract: The near-infrared emission spectrum of the A2A' --> X2A" transition of the hydroperoxyl radical, HO2, has been studied by Fourier transform spectrometry. The 000 --> 000 band has been recorded at high spectral resolution. DeltaKa = +/-1 subbands up to Ka' = 9 --> Ka" = 8 and Ka' = 8 --> Ka" = 9 comprising lines from rotational levels up to N' = 32 have been observed. With about a factor of 10 lower intensity, DeltaKa = 0 subbands 0-0 to 6-6 were found which are shown to be due to magnetic dipole transitions. In addition, in the 2-2 sub-band "forbidden" electric dipole lines were observed. These likely are induced by Renner-Teller interaction. Local perturbations extending over 3-10 N' values are found in the Ka' = 0-7 levels of the A2A' state. One series of perturbations is attributed to DeltaKa = 0, DeltaJ = 0 interactions with the 112 level of the X2A" ground state. Copyright 1997 Academic Press. Copyright 1997Academic Press
authors.affiliation: Fachbereich 9, Bergische Universitat-Gesamthochschule Wuppertal, Wuppertal, D-42097, Federal Republic of Germany
authors.initials: EH
authors.lastname: Fink
authors.initials: DA
authors.lastname: Ramsay