Width of Carbon Resonance Lines and Identification of Bands in Radiation from Carbon Resonance Lamp

摘要

The emission bands that occur in the radiation from a carbon resonance lamp in the spectral range from 1650 to 1900A were identified as part of the CO 4th positive system. A brief study was made of the source of CO and its effect on the emission. It was found that the CO may come from the reaction of graphite with oxygen introduced as an impurity in the filler gas or from oxygen or CO contained in inadequately degased graphite cathode. Large concentrations of CO cause some decrease in radiation intensity. The carbon resonance 'line' at 1657A was also studied. There was little or no line broadening due to self absorption, and the line width of all the components of the resonance 'line' was