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[1] We have measured the emission cross sections of the Lyman-Birge-Hopfield (LBH) a 1 P g − X 1 S g + band system and several atomic nitrogen (N I) multiplets (1200, 1243, 1493 Å) by H + (proton) impact on N 2 over an impact energy range of 1-7 keV. The peak proton-impact-induced emission cross section of the LBH band system (1260-2500 Å) was measured to be 5.05 ± 1.52 × 10 −17 cm 2 at 7 keV. To the best of our knowledge, the present LBH emission cross sections are reported for the first time in the far ultraviolet (FUV) wavelength range of 1100-1600 Å. The proton energy range in this study, when coupled with previously published 10-100 keV proton excited emissions of N I multiplets, provides a wide energy range of emission cross sections for proton energy loss transport codes. This energy range includes the peak cross section and the energy range for Born scaling. The reported measurements lead to an important component of monoenergetic yields for proton FUV auroral emission. Such yields, based on emission cross sections and transport modeling, allowed for convenient comparison of emission efficiencies between proton and electron aurora. In addition, we have measured the H Ly a, LBH, and N I multiplet emission cross sections for H 2 + and H 3 + ion impact on N 2 at 5 keV and found that the magnitude of H Ly a emission cross section, s em (Ly a), follows in the order of impact ion mass H 3 + > H 2 + > H + .Citation: Ajello, J. M., R. S. Mangina, D. J. Strickland, and D. Dziczek (2011), Laboratory studies of UV emissions from proton impact on N 2 : The Lyman-Birge-Hopfield band system for aurora analysis,

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Electron-impact emission cross sections for N2 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 3Π g +(ν′) → A 3Σ g +(ν″) and the second positive band system C 3Π u (ν′) → B 3Π g (ν″) of N2, the first negative band (1NB) system B 2Σ u +(ν′) → X 2Σ g +(ν″) and Meinel band system A 2Π u (ν′) → X 2Σ g +(ν″) of N2 + 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 (λ/Δλ ≈ 10000) under single-collision-scattering geometry and optically thin conditions. Rotational emission lines of N2 and N2 + 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 Hα emission cross sections of H2 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.