Excitation of 3914 ÅN2+Radiation in Collisions of Heavy Ions withN2

Abstract

The cross sections for production of the (0, 0) transition of ${\mathrm{N}}_2^{+}$ first negative bands (3914 Å) produced in collisions of several heavy ions with ${\mathrm{N}}_2$ have been measured. The ions used were ${\mathrm{Ba}}^{+}$, ${\mathrm{Ba}}^{++}$, ${\mathrm{Xe}}^{+}$, ${\mathrm{N}}^{+}$, ${\mathrm{O}}^{+}$, and ${\mathrm{N}}_2^{+}$ in the energy range from approximately 50 keV to 2 MeV. Absolute cross sections were determined by comparing signals produced on ion impact with those produced by an electron beam passing through the gas cell and using the known electron-impact excitation cross sections. Signals were detected using an interference filtered photo-multiplier. The results are compared with those of other investigators where such other results exist.