Spectra Induced by 200-kev Proton Impact on Nitrogen

Abstract

Spectra induced by 200-kev proton impact on nitrogen have been observed in the spectral region from $\ensuremath{\lambda}3000 \mathrm{A}\mathrm{to} \ensuremath{\lambda}6000 \mathrm{A}$. The principal feature was the strong excitation of the ${\mathrm{N}}_{2}^{+}$ 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 ${\mathrm{H}}_{\ensuremath{\beta}}$ 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 ${\mathrm{N}}_{2}$ bands were observed at higher pressures.