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Article

Laser-Plasma Spectroscopy of Hydroxyl with Applications

1
Physics and Astronomy Department, University of Tennessee, University of Tennessee Space Institute, Center for Laser Applications, 411 B.H. Goethert Parkway, Tullahoma, TN 37388-9700, USA
2
Nuclear Engineering Department, Tickle College of Engineering, University of Tennessee, 1412 Circle Drive, Knoxville, TN 37912, USA
3
Physics and Applied Physics Department, University of Massachusetts Lowell, Lowell, MA 01854, USA
4
Wellinq Medical, Van der Waals Park 22, 9351 VC Leek, The Netherlands
*
Author to whom correspondence should be addressed.
Molecules 2020, 25(4), 988; https://doi.org/10.3390/molecules25040988
Received: 4 February 2020 / Revised: 18 February 2020 / Accepted: 20 February 2020 / Published: 22 February 2020
(This article belongs to the Special Issue Practical Applications of Molecular Spectroscopy)
This article discusses laser-induced laboratory-air plasma measurements and analysis of hydroxyl (OH) ultraviolet spectra. The computations of the OH spectra utilize line strength data that were developed previously and that are now communicated for the first time. The line strengths have been utilized extensively in interpretation of recorded molecular emission spectra and have been well-tested in laser-induced fluorescence applications for the purpose of temperature inferences from recorded data. Moreover, new experiments with Q-switched laser pulses illustrate occurrence of molecular recombination spectra for time delays of the order of several dozen of microseconds after plasma initiation. The OH signals occur due to the natural humidity in laboratory air. Centrifugal stretching of the Franck-Condon factors and r-centroids are included in the process of determining the line strengths that are communicated as a Supplementary File. Laser spectroscopy applications of detailed OH computations include laser-induced plasma and combustion analyses, to name but two applications. This work also includes literature references that address various diagnosis applications. View Full-Text
Keywords: plasma diagnostics; molecular spectra; diatomic molecules; plasma spectroscopy; laser spectroscopy; laser-induced breakdown spectroscopy; optical emission spectroscopy; molecular excitation temperature; combustion analysis; astrophysical spectroscopy plasma diagnostics; molecular spectra; diatomic molecules; plasma spectroscopy; laser spectroscopy; laser-induced breakdown spectroscopy; optical emission spectroscopy; molecular excitation temperature; combustion analysis; astrophysical spectroscopy
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MDPI and ACS Style

Parigger, C.G.; Helstern, C.M.; Jordan, B.S.; Surmick, D.M.; Splinter, R. Laser-Plasma Spectroscopy of Hydroxyl with Applications. Molecules 2020, 25, 988. https://doi.org/10.3390/molecules25040988

AMA Style

Parigger CG, Helstern CM, Jordan BS, Surmick DM, Splinter R. Laser-Plasma Spectroscopy of Hydroxyl with Applications. Molecules. 2020; 25(4):988. https://doi.org/10.3390/molecules25040988

Chicago/Turabian Style

Parigger, Christian G., Christopher M. Helstern, Benjamin S. Jordan, David M. Surmick, and Robert Splinter. 2020. "Laser-Plasma Spectroscopy of Hydroxyl with Applications" Molecules 25, no. 4: 988. https://doi.org/10.3390/molecules25040988

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