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Volume 13
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10.3390/app13031370
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Article

Investigations on Pressure Broadening Coefficients of NO Lines in the 1←0 Band for N2, CO2, Ar, H2, O2 and He

by
Sumit Agarwal
1,*,
Leopold Seifert
1,
Denghao Zhu
1,
Bo Shu
1,
Ravi Fernandes
1,2 and
Zhechao Qu
1,*
1
Department of Physical Chemistry, Physikalisch-Technische Bundesanstalt, 38116 Braunschweig, Germany
2
Institute of Internal Combustion Engines, Technische Universität Braunschweig, 38106 Braunschweig, Germany
*
Authors to whom correspondence should be addressed.
Appl. Sci. 2023, 13(3), 1370; https://doi.org/10.3390/app13031370
Submission received: 22 December 2022 / Revised: 16 January 2023 / Accepted: 18 January 2023 / Published: 20 January 2023
(This article belongs to the Special Issue Laser Diagnostics and Its Application)
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Abstract

A tunable diode laser absorption spectroscopy (TDLAS)-based spectrometer employing a mid-infrared (Mid-IR) interband cascade laser (ICL) was developed and used to determine pressure broadening coefficients of two NO absorption transitions at 1914.98 cm−1 and 1915.76 cm−1 in the fundamental (1←0) band (R11.5 Ω1/2 and Ω3/2) for CO2, N2, Ar, O2, He, and H2. For the first time, a reliable and consistent set of six different pressure-broadening coefficients for the NO line has been measured by a consistent approach covering pressures from 100 to 970 mbar at a temperature of 294 K. Air pressure broadening has been calculated based on N2 and O2 coefficients. The stated pressure-broadening coefficients for N2, CO2, Ar, H2, O2, He, and Air have relative errors in the 0.5–1.5% range. For CO2 and H2, broadening results of NO (1←0) band (R11.5 Ω1/2 and Ω3/2) lines are reported for the first time. The results are also compared to previously available literature data. It was found that the broadening coefficients for O2 and Air are in agreement with literature values, whereas results for Ar and He show larger differences.
Keywords: absorption spectroscopy; broadening coefficient; Nitric Oxide; uncertainty absorption spectroscopy; broadening coefficient; Nitric Oxide; uncertainty

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MDPI and ACS Style

Agarwal, S.; Seifert, L.; Zhu, D.; Shu, B.; Fernandes, R.; Qu, Z. Investigations on Pressure Broadening Coefficients of NO Lines in the 1←0 Band for N2, CO2, Ar, H2, O2 and He. Appl. Sci. 2023, 13, 1370. https://doi.org/10.3390/app13031370

AMA Style

Agarwal S, Seifert L, Zhu D, Shu B, Fernandes R, Qu Z. Investigations on Pressure Broadening Coefficients of NO Lines in the 1←0 Band for N2, CO2, Ar, H2, O2 and He. Applied Sciences. 2023; 13(3):1370. https://doi.org/10.3390/app13031370

Chicago/Turabian Style

Agarwal, Sumit, Leopold Seifert, Denghao Zhu, Bo Shu, Ravi Fernandes, and Zhechao Qu. 2023. "Investigations on Pressure Broadening Coefficients of NO Lines in the 1←0 Band for N2, CO2, Ar, H2, O2 and He" Applied Sciences 13, no. 3: 1370. https://doi.org/10.3390/app13031370

APA Style

Agarwal, S., Seifert, L., Zhu, D., Shu, B., Fernandes, R., & Qu, Z. (2023). Investigations on Pressure Broadening Coefficients of NO Lines in the 1←0 Band for N2, CO2, Ar, H2, O2 and He. Applied Sciences, 13(3), 1370. https://doi.org/10.3390/app13031370

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