Ultraviolet Lasing Transitions in Diatomic Molecules

摘要

The work performed is primarily directed toward a better spectroscopic understanding of UV laser transitions in selected diatomic molecules. Specifically the work emphasizes the analysis of spectroscopic data for discrete (bound-bound) and diffuse (bound-free) transitions in the rare gas monohalide (RgX) molecules and discrete transitions in the homonuclear halogens. The primary accomplishments of the work include detailed rotational and vibrational analyses of the lasing B to X transition in XeF (3500 A) and the lasing D' to A' transition in Br2 (2900 A); (2) vibrational analyses of the lasing transitions B to X in XeCl (3100 A) and D' to A' in I2 (3400 A), and the nonlasing D to X transitions in XeF (2600 A) and XeCl (2350 A); analysis of the bound-free B to X and D to X transitions in other RgX molecules, with emphasis on KrCl; reanalysis of the D to X UV fluorescence spectrum of I2; determination of potential curves and intensity factors (Franck-Condon factors, stimulated emission cross sections) for all analyzed systems; determination of the energy ordering of the B and C states in KrCl, XeCl, and XeBr, using temperature-dependent emission spectroscopy; and characterization of a tesla discharge with respect to its temporal and thermal properties and its total radiant output.