High-resolution electron energy-loss spectrum of the nitrogen afterglow in the energy-loss region 10.5 to 12.5 eV

High-resolution electron energy-loss spectra of the N 2 afterglow have revealed transitions from the first nine vibrationally-excited levels of the ground state to the b 1 Pi u and b' 1 Sigma u + non-Rydberg states in the electron energy-loss range 10.5 to 12.5 eV. The results are compared with the Franck-Condon factor calculations of Nicholls (1962).