Lyman-band fluorescence intensity vs H_2 pressure

Abstract
The fluorescence intensity of the H2 Lyman bands (B1Σu+ → X1Σ+g) excited by the argon 1066 Å line was found to have a linear dependence on H2 pressure at pressures less than 10-3 torr. The fluorescence from the HD that occurs naturally in the hydrogen was found to be similarly dependent on the HD partial pressure.