Differential cross sections for the electron impact excitation of the a<sup>1</sup> Delta <sub>g</sub> and b<sup>1</sup> Sigma <sub>g</sub><sup>+</sup> electronic states of O<sub>2</sub>
A G Middleton; M J Brunger; P J O Teubner; M W B Anderson; C J Noble; G Woste; K Blum; P G Burke; C Fullerton; A G Middleton; Inst. of Atomic Studies, Flinders Univ. of South Australia, Bedford Park, SA, Australia; M J Brunger; Inst. of Atomic Studies, Flinders Univ. of South Australia, Bedford Park, SA, Australia; P J O Teubner; Inst. of Atomic Studies, Flinders Univ. of South Australia, Bedford Park, SA, Australia; M W B Anderson; Inst. of Atomic Studies, Flinders Univ. of South Australia, Bedford Park, SA, Australia; C J Noble; Inst. of Atomic Studies, Flinders Univ. of South Australia, Bedford Park, SA, Australia; G Woste; Inst. of Atomic Studies, Flinders Univ. of South Australia, Bedford Park, SA, Australia; K Blum; Inst. of Atomic Studies, Flinders Univ. of South Australia, Bedford Park, SA, Australia; P G Burke; Inst. of Atomic Studies, Flinders Univ. of South Australia, Bedford Park, SA, Australia; C Fullerton; Inst. of Atomic Studies, Flinders Univ. of South Australia, Bedford Park, SA, Australia
Журнал:
Journal of Physics B: Atomic, Molecular and Optical Physics
Дата:
1994-09-14
Аннотация:
Experimental and theoretical differential cross sections for the electron impact excitation of the a<sup>1</sup> Delta <sub>g</sub> and b<sup>1</sup> Sigma <sub>g</sub><sup>+</sup> electronic states of O<sub>2</sub> have been determined at ten incident energies ranging from 5 eV to 20 eV. The current experimental differential cross sections were obtained for the scattering range 10 degrees to 90 degrees by analysing energy loss spectra in O<sub>2</sub> at a number of fixed scattering angles within that range. This data represents an extension to and comprehensive remeasurement of the pioneering work of Trajmar and co-workers for this scattering system. The present theoretical results were obtained using the R-matrix method with a model including nine electronic states of the target molecule and configuration interaction (CI) representations of the target wavefunctions. It represents one of the first ab initio calculations of electron scattering from an open-shell molecule.
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