Mueller, Max and Rueck, Thomas and Jobst, Simon and Pangerl, Jonas and Weigl, Stefan and Bierl, Rudolf and Matysik, Frank -Michael (2022) An Algorithmic Approach to Compute the Effect of Non-Radiative Relaxation Processes in Photoacoustic Spectroscopy. PHOTOACOUSTICS, 26: 100371. ISSN 2213-5979,
Full text not available from this repository. (Request a copy)Abstract
Successful transfer of photoacoustic gas sensors from laboratory to real-life applications requires knowledge about potential cross-sensitivities towards environmental and gas matrix changes. Multi-dimensional calibration in case of cross-sensitivities can become very complex or even unfeasible. To address this challenge, we present a novel algorithm to compute the collision based non-radiative efficiency and phase lag of energy relaxation on a molecular level (CoNRad) for photoacoustic signal calculation. This algorithmic approach allows to calculate the entire relaxation cascade of arbitrarily complex systems, yielding a theoretical photoacoustic signal. In this work the influence of varying bulk compositions, i.e. nitrogen (N2), oxygen (O2) and water (H2O) on the photoacoustic signal during methane (CH4) detection is demonstrated. The applicability of the algorithm to other photoacoustic setups is shown exemplary by applying it to the relaxational system investigated in [1]. Hayden et al. examined the effect of water on photoacoustic carbon monoxide (CO) detection.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | VIBRATIONAL-ENERGY TRANSFER; METHANE; MIXTURES; OXYGEN; AIR; SIGNAL; QEPAS; O-2; Photoacoustic spectroscopy; Relaxation effects; Molecular energy transitions; Algorithm simulation |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Analytische Chemie, Chemo- und Biosensorik > Instrumentelle Analytik (Prof. Frank-Michael Matysik) |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 07 Nov 2023 14:27 |
| Last Modified: | 07 Nov 2023 14:27 |
| URI: | https://pred.uni-regensburg.de/id/eprint/56723 |
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