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Excitation of the C  1Sigma++c  3Pi and E  1Pi electronic states of carbon monoxide by electron impact

H. Kawahara, H. Kato, M. Hoshino, H. Tanaka, and M. J. Brunger

Phys. Rev. A: At. Mol. Opt. Phys., vol: 77, num: 1, 7 pages, published: 18 January 2008, 012713

Abstract: We report differential cross-section measurements for electron-impact excitation of the C  1Sigma++c  3Pi and E  1Pi 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  1Sigma+ and E  1Pi 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)].

   Atoms and molecules.
      Interaction of atoms and molecules with external fields and radiation.
         Transitions between electronic states.
            Lifetimes and transition probabilities for molecules.

   Atoms and molecules.
      Collisions of atoms and molecules with particles.
         Collisions of molecules with light particles.
            Excitation and deactivation.