Analysis of Hollow-Cathode-Discharge-Excited Ar i, Ar ii, and Au i Spectral-Line Profiles Measured with a Fabry–Perot Interferometer*

摘要: Spectral profiles of Au i, Ar and ii lines obtained with a scanning Fabry–Perot spectrometer from low-current, 3.2-mm-diam hollow-cathode discharge in ~6 torr are fitted Voigt functions to determine the apparent lorentzian half-widths, ΔLs, Doppler temperatures, Ts, as current. Ts values i 4792-A line approximately equal those lines, whereas for 3123-A line, much greater. Arguments presented show that these high result initial ejection energy sputtered atoms short lifetime upper state. Typically, = 1010, 1180, 1760 K 4511, 4792, respectively. The doublet-state quartet-state significantly lower. ΔLs whose transitions terminate on resonance states, predicted by resonance-broadening theory. range 0.010 0.031 cm−1 far exceed calculated resonance- Stark-broadening terms. A proposed model spectral-line profile consists superposition two pure gaussian distributions, which represent one group high-energy ions accelerated axial electric fields an electrical double layer (DL) at end cathode, second equilibrium atoms. sum closely approximates function analysis yields values, ΔLc Tc, corresponding observed quantities. found vary conditions, presumably depending upon completion DL formation.