Momentum-transfer dependence of the Lyman-Birge-Hopfield and the K-shell preionization lines in the nitrogen molecule by means of high-energy electron-impact spectroscopy.

The generalized-oscillator-strength (GOS) distribution for the Lyman-Birge-Hopfield (LBH) and the K-shell preionization lines in the nitrogen molecule, obtained with electron impact energies of 25-28 keV, are reported for the momentum-transfer range of 0.5-3.1 a.u. The results for the LBH were found to be in agreement with previously published low-energy experiments and also the most recent theoretical predictions. Possible reasons for problems encountered in previous high-energy electron spectroscopic experiments are discussed