ИСТИНА

Molecular emission, which appears at later observation times of laser-induced plasma due to its cooling and recombination, is often considered undesirable in analytical measurements due to atomic depletion and spectral interference. However, in specific cases, it provides unique advantages. This talk covers four key applications: (i) Isotopic analysis and halogen detection – Significant isotopic shifts of some molecules enable their determination, while CaHal compounds enable sensitive halogen detection due to their lower excitation potential and relatively high content. (ii) Plasma thermometry – In plasmas with few atomic lines (e.g., organic targets, low-temperature conditions), molecules like CN, AlO, and CaO can be used instead of atomic lines for temperature estimation. (iii) Application of CN emission from laser-induced plasma to support studies on extrapolating newly calculated CN potential energy functions and transition strengths into high rotational states. (iv) Laboratory modeling of meteor wake emission – Fe and FeO emissions in laser-induced plasma at reduced pressures (75–150 Torr) were analyzed to simulate meteor wake conditions. The spectral similarity between laser-induced plasma at 75–150 Torr and the Benešov bolide spectra at 39 km altitude suggests that the pressure in the bolide wake is 20–30 times higher than ambient.