DOAJ Open Access 2023

Assessment of vibrational-translational relaxation dynamics of methane isotopologues in a wet-nitrogen matrix through QEPAS

Mariagrazia Olivieri Marilena Giglio Stefano Dello Russo Giansergio Menduni Andrea Zifarelli +5 lainnya

Abstrak

Here we report on a study of the non-radiative relaxation dynamic of 12CH4 and 13CH4 in wet nitrogen-based matrixes by using the quartz-enhanced photoacoustic spectroscopy (QEPAS) technique. The dependence of the QEPAS signal on pressure at fixed matrix composition and on H2O concentration at fixed pressure was investigated. We demonstrated that QEPAS measurements can be used to retrieve both the effective relaxation rate in the matrix, and the V-T relaxation rate associated to collisions with nitrogen and water vapor. No significant differences in measured relaxation rates were observed between the two isotopologues.

Topik & Kata Kunci

Physics Acoustics. Sound Optics. Light

Penulis (10)

Mariagrazia Olivieri

Marilena Giglio

Stefano Dello Russo

Giansergio Menduni

Andrea Zifarelli

Pietro Patimisco

Angelo Sampaolo

Hongpeng Wu

Lei Dong

Vincenzo Spagnolo

Format Sitasi

APA MLA BibTeX

Olivieri, M., Giglio, M., Russo, S.D., Menduni, G., Zifarelli, A., Patimisco, P. et al. (2023). Assessment of vibrational-translational relaxation dynamics of methane isotopologues in a wet-nitrogen matrix through QEPAS. https://doi.org/10.1016/j.pacs.2023.100518

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Informasi Jurnal

Tahun Terbit: 2023
Sumber Database: DOAJ
DOI: 10.1016/j.pacs.2023.100518
Akses: Open Access ✓