title: High-Resolution Fourier-Transform Study of the b(1)Sigma(+) --> X(3)Sigma(-) and a(1)Delta --> X(3)Sigma(-) Transitions of SO.
abstract: Emission spectra of the b(1)Sigma(+) --> X(3)Sigma(-) and a(1)Delta --> X(3)Sigma(-) transitions of SO in the near-infrared spectral region were studied at high spectral resolution with a Fourier-transform spectrometer. The 0-0 band of the b --> X system was measured at high signal/noise and four magnetic dipole branches were observed in addition to the previously known five electric dipole branches. From the relative line intensities and the radiative lifetime of the b state, the electric and magnetic transition moments were determined to be µ(0) = +/-0.0042 ea(0), µ(1) = -/+0.0047 ea(0), and M = 0.16 µ(B). All nine electric dipole branches were observed in the 0-0 band of the a --> X transition. Fixing the rotational constants of the X(3)Sigma(-) ground state to microwave values, the following parameters were obtained for the a(1)Delta state (in cm(-1)): v(00) = 5862.1853(1), B(0) = 0.71033746(37), D(0) = 1.16814(46) x 10(-6) (with H(0) fixed to -3.99 x 10(-13)), where the numbers in parentheses are the standard deviations of the parameters. Copyright 1999 Academic Press.
authors.affiliation: Physikalische Chemie-Fachbereich 9, Bergische Universität-Gesamthochschule Wuppertal, Wuppertal, D-42097, Germany
authors.initials: KD
authors.lastname: Setzer
authors.initials: EH
authors.lastname: Fink
authors.initials: DA
authors.lastname: Ramsay