A Remarkable Green Line Source

Abstract

IN a number of communications in these columns I have reported the observation of high relative intensities of forbidden lines of atomic nitrogen and the forbidden bands of molecular nitrogen in nitrogen afterglows. Both the absolute and relative intensities of these radiations increased with pressure over the range which had been studied up to the spring of 1941. This included pressures from about 0.001 to 30 mm. In addition, the relative intensities increased as the time between the interruption of the afterglow producing discharge and the exposure of the afterglow was increased1. This effect has been referred to as the temporal effect.