Spectral Interference in Laser Induced Chemical Processes in High Temperature and High Pressure Environments
The raw data contains ionization (absorption) signal and emission spectrum in a laser driven heat pipe oven (1500oC) with metal vapor (0.5 Torr) and noble gas (15 Torr). A generic line profile formula in terms of spectral shift, broadening and interference parameter is developed and used to fit the data. The assembled figures reveal one-to-one correlation among the three figures.
The results indicate the ionization signals were attributed to the optical allowed two-photon transitions from the ground state in Mg. The emission spectral consists of two-photon allowed and forbidden transition series to the ground states in Mg. The interference indicates formation of dimers and trimers of Mg vapor and clusters with noble gas atoms. Both spectra represent spectral shifts and broadening relative to the atomic spectrum.