Abstract
We report the results of a theoretical study of resonant vibrational-excitation of by low-energy electrons. The vibrational-excitation cross sections were calculated using ab initio fixed-nuclei resonance parameters in the complex-potential or "boomerang" model of Dubé and Herzenberg. The electronic resonance energy and decay width were extracted from several ab initio calculations of the shape resonance of . The good agreement between the present cross sections and those obtained recently with the -matrix technique indicates that the assumptions underlying the complex-potential model are valid for the case of . The present results also show the sensitivity of the computed vibrational-excitation cross sections to the fixed-nuclei resonance parameters employed in the calculations. The differential vibrational-excitation cross sections at 90° and the total integrated cross section which we have obtained agree resonably well with the available experimental data.
- Received 22 September 1980
DOI:https://doi.org/10.1103/PhysRevA.23.1089
©1981 American Physical Society