Time-resolved FTIR emission spectroscopy of Ag in the 1300 - 3600 cm-1 region: Transitions involving f and g states and oscillator strengths
Abstract
We report on a study of the emission spectra of Ag vapor in a vacuum (10−2 Torr) formed in ablation of an Ag metal target by a high-repetition rate (1.0 kHz) pulsed nanosecond ArF laser. The time-resolved infrared emission spectrum of Ag was recorded in the 1300 to 3600cm−1 spectral region using the Fourier transform infrared spectroscopy technique.
The time profiles of themeasured lines have maxima at 5–6 μs after a laser shot and display nonexponential decay with a decay time of 3–7 μs. The line classification is performed using relative line strengths expressed in terms of transition dipole matrix elements calculated with the help of the Fues model potential; these calculations show agreement with the large experimental and calculated data sets available in the literature.
In addition to these data we also calculate transition probabilities and line and oscillator strengths for a number of transitions between (4d10)nlj states of Ag.