Excitation of the C ~1Σ~++c ~3II and E ~1II electronic states of carbon monoxide by electron impact

摘要

We report differential cross-section measurements for electron-impact excitation of the C ~1Σ~++c ~3H and E ~1II electronic states in carbon monoxide. The energy range of this work is 30-200 eV. Where a comparison is possible, reasonable agreement is found with the earlier 20-50 eV results from Middleton et al. [J. Phys. B 26, 1743 (1993)]. A generalized oscillator strength analysis of the present differential cross-section data enables us to determine estimates of the corresponding integral cross sections, which are compared to results from the BEf-scaling approach [Y.-K. Kim, J. Chem. Phys. 126, 064305 (2007)] calculated as a part of this study. Very good agreement between them is in general found. Finally our 100-eV and 200-eV generalized oscillator strength data are also employed to determine values of the respective C ~1Σ~+ and E ~1II optical oscillator strengths, with excellent agreement being found between them and the previous dipole (e, e) results from Chan et al. [Chem. Phys. 170, 123 (1993)].