Contribution of Hyperfine Structure to the Measured Widths of Gold Hollow-Cathode Lines

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Abstract
The effects of hyperfine structure on the measured widths of some gold hollow-cathode lines are considered. Correction factors are presented for the apparent Doppler temperatures derived from line-profile measurements of the gold 4793- and 3123-Å lines and from line-absorption and total-absorption measurements on the gold 2428- and 2676-Å resonance lines. These factors account for much of the difference between the Doppler temperatures of the gold lines and of the neutral-argon lines are reported by Kreye and Roesler. The effect of the large ejection velocities of the sputtered gold atoms on the effective temperature of the emitting vapor was investigated using Monte Carlo techniques; the results indicate that this source of Doppler broadening is insignificant at the argon pressures normally used in hollow-cathode lamps.