HIGH-RESOLUTION ELECTRON-IMPACT EMISSION SPECTRA AND VIBRATIONAL EMISSION CROSS SECTIONS FROM 330-1100 nm FOR N2

Electron-impact emission cross sections for N-2 were measured in the wavelength range of 330-1100 nm at 25 eV and 100 eV impact energies. Cross sections of several molecular emission bands of the first positive band system B (3)Pi(+)(g)(nu') -> A (3)Sigma(+)(g)(nu '') and the second positive band system C (3)Pi(u)(nu') -> B (3)Pi(g)(nu '') of N-2, the first negative band (1NB) system B (2)Sigma(+)(u)(nu') -> X (2)Sigma(+)(g)(nu '') and Meinel band system A (2)Pi(u)(nu') -> X (2)Sigma(+)(g)(nu '') of N-2(+) ions as well as line emissions of N (N I) and N+ (N II) in the visible-optical-near-IR wavelength range reported in this work were measured for the first time in a single experimental setup at high spectral resolving power (lambda/Delta lambda approximate to 10000) under single-collision-scattering geometry and optically thin conditions. Rotational emission lines of N-2 and N-2(+) were observed for strong emission bands at a gas temperature of about 300 K. The absolute cross section of the strongest (0,0) vibrational band at 391.43 nm of 1NB was determined using the standard H-alpha emission cross sections of H-2 by electron impact at both 25 eV and 100 eV electron-impact energies, and the cross sections for the remainder of the emissions were determined using (0,0) 1NB value. A comparison of the present emission cross sections with the earlier published data from both electron energy loss and electron-impact-induced fluorescence emission is discussed.