Spatially uniform microdischarges in Xe at pressures of 300-800 torr have been produced in a 90-μm gap between 1.5-mm-diameter tungsten rods (plasma volume of ∼160 μL), and applied to the laser spectroscopy of the Xe2 excimer. Calculations and spectral simulations indicate that the gas temperature in the plasma reaches 900 K for a steady-state current density of 0.23 A-cm-2. Laser-induced, fluorescence suppression spectroscopy in the afterglow of the crow-barred discharge reveals well-developed vibrational bands in the 680-800-nm region tentatively attributed to 5 (1g) ← a3 ∑u+ (1u, 0u-) transitions of Xe2.
- Laser spectroscopy
- Molecular spectroscopy
ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Condensed Matter Physics