A STUDY OF VIBRONIC COUPLING IN THE [MATH] STATE OF CO+2

Pascal Roy , T. Ferrett , V. Schmidt , A. Parr , S. Southworth , J. Hardis , R. Bartlett , W. Trela , J. Dehmer

We have studied vibronic coupling in vibrationally resolved photoionization to the [MATH] (2∑g+) state of CO2+ in the photon-energy range hν=20-28.5 eV. The measurements utilize high-resolution hemispherical electron analyzers, equipped with area detectors, and the SURF-II synchrotron radiation source at the National Bureau of Standards. The angular distribution asymmetry-parameters (β) for the allowed [MATH](0,0,0) and forbidden [MATH](1,0,1) (19.747 eV binding energy) peaks are found to be quite different. However, similarities between the [MATH](1,0,1) β curve and that for the [MATH] state suggest that vibronic coupling to the [MATH] (2∑u+) state of CO2+ is the explanation for the intensity of the [MATH] state forbidden band in the first 8 eV above threshold.

Domaines: Articles anciens

Pascal Roy, T. Ferrett, V. Schmidt, A. Parr, S. Southworth, et al.. A STUDY OF VIBRONIC COUPLING IN THE [MATH] STATE OF CO+2. Journal de Physique Colloques, 1987, 48 (C9), pp.C9-765-C9-768. ⟨10.1051/jphyscol:19879133⟩. ⟨jpa-00227243⟩