ABSTRACT
The radial temperature profile, total lamp pressure, and assumption of Saha equilibrium are used to determine the electron density profile and compute the radiance of the e-Hg-atom Bremsstrahlung.
Our hypothesis is tested by comparing simulated and measured low-resolution (LR) side-on radiance spectra of a vertically operated UHP 120W lamp. The simulated e-Hg-atom Bremsstrahlung radiances L(?, 0) in the wavelength range X = 500 — 700 nm are about a factor of 2 lower than the experiment (cf. Figure 2). This discrepancy might be an indication that contributions by molecular radiation also play an important role. Since reliable Hg2 potential curves for the presumed transitions are still missing in the literature, we are not able to simulate these contributions with sufficient accuracy.
