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Molecules in laser-induced plasma:an anomaly or a key to solving intractable problemsтезисы доклада Тезисы
- Авторы: Labutin Timur A., Popov Andrey, Zakuskin Aleksandr, Sushkov Nikolai, Zaytsev Sergey
- Сборник: Book of Abstracts of the 78th International Symposium on Molecular Spectroscopy
- Тезисы
- Год издания: 2025
- Издательство: University of Illinois Press.
- Местоположение издательства: Urbana, United States
- Первая страница: 177
- Аннотация: 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 halogendetection – Significant isotopic shifts of some molecules enable their determination, while CaHal compounds enable sensitivehalogen detection due to their lower excitation potential and relatively high content. (ii) Plasma thermometry – In plasmaswith few atomic lines (e.g., organic targets, low-temperature conditions), molecules like CN, AlO, and CaO can be usedinstead of atomic lines for temperature estimation. (iii) Application of CN emission from laser-induced plasma to supportstudies 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 at75–150 Torr and the Beneˇsov bolide spectra at 39 km altitude suggests that the pressure in the bolide wake is 20–30 timeshigher than ambient.This work was supported by The Russian Science Foundation (Project No. 23-13-00207)
- Добавил в систему: Закускин Александр Сергеевич