Mercury Resonance Radiation in the High-Current, Low-Pressure Discharge

Abstract

The dependence of the intensities of the 1849- and 2537-Å resonance lines on current density, in the range 0.2–2 A/cm2, Hg pressure 10−3–0.5 torr, and discharge-tube diameter 10–25 mm, have been measured. The intensities nearly saturate at about 2 A/cm2. Absolute output at 1849 Å, measured photochemically, is consistent with the results of B. T. Barnes. The dependence of this output on the measured parameters make this discharge a good absolute flux-density standard at 1849 Å.