Spectra Induced by 200-kev Proton Impact on Nitrogen

Spectra induced by 200-kev proton impact on nitrogen have been observed in the spectral region from λ3000 Ato λ6000 A. The principal feature was the strong excitation of the N₂⁺ first negative band systems. Absolute cross sections for excitation were determined for the principal bands of this system as well as for two Nii atomic lines. A relatively weak Doppler-shifted H_β line was detected, and the cross section for the charge-exchange electron-capture into the $n=4$ excited state of hydrogen was estimated. Second positive N₂ bands were observed at higher pressures.