Measurement of the 13 to 100 eV electron impact excitation cross section for the X 1Σ+g→a 1Πg transition in N2

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Abstract
The electron impact excitation cross section for the X 1Σ+g→ a 1Πg transition in N2 has been measured from 13 to 100 eV by an inelastic electron scattering technique. The cross section varies from a maximum value of 3.6×10−17 cm2 between 15 and 18 eV to 5.2×10−18 cm2 at 100 eV. The incident electron impact energy was calibrated by an optical technique. The agreement between the measured intensities of the v′=0–6 vibrational bands of the transition and the intensities predicted by the Franck–Condon factors was found to be within experimental error. The cross section results of the present experiment are in excellent agreement with those of previous investigators obtained with a variety of techniques up to 30 eV. At the higher energies, the present values agree within experimental error with the results of Holland at 100 eV and those of Aarts between 60 and 100 eV.