Excitation of N 2 and N +2 systems by electrons—I . Absolute transition probabilities

Abstract

Quantitative optical measurements of the N 21 P,2 P and N + 21 N and Meinel systems, excited by electrons, have allowed measurements of transition probabilities, excitation cross-sections, and afterglow effects. This work is reported in two parts. The experiment and observations are described in detail in this article. Absolute transition probabilities have been derived for the N 21 P and the N + 2 M systems. Tables of values for the N 22 P and N + 21 N systems, compiled from earlier measurements, are included to provide a complete set for the four systems.