Investigations on Pressure Broadening Coefficients of NO Lines in the 1←0 Band for N<sub>2</sub>, CO<sub>2</sub>, Ar, H<sub>2</sub>, O<sub>2</sub> and He
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<sup>−1</sup> and 1915.76 cm<sup&...
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MDPI AG
2023-01-01
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| author | Sumit Agarwal Leopold Seifert Denghao Zhu Bo Shu Ravi Fernandes Zhechao Qu |
| author_facet | Sumit Agarwal Leopold Seifert Denghao Zhu Bo Shu Ravi Fernandes Zhechao Qu |
| author_sort | Sumit Agarwal |
| collection | DOAJ |
| description | 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<sup>−1</sup> and 1915.76 cm<sup>−1</sup> in the fundamental (1←0) band (R11.5 Ω1/2 and Ω3/2) for CO<sub>2</sub>, N<sub>2</sub>, Ar, O<sub>2</sub>, He, and H<sub>2</sub>. 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 N<sub>2</sub> and O<sub>2</sub> coefficients. The stated pressure-broadening coefficients for N<sub>2</sub>, CO<sub>2</sub>, Ar, H<sub>2</sub>, O<sub>2</sub>, He, and Air have relative errors in the 0.5–1.5% range. For CO<sub>2</sub> and H<sub>2,</sub> 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 O<sub>2</sub> and Air are in agreement with literature values, whereas results for Ar and He show larger differences. |
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| language | English |
| last_indexed | 2024-03-11T09:53:23Z |
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| spelling | doaj.art-cf0decd9e2bf4449b51d4963e7fff1b02023-11-16T16:04:29ZengMDPI AGApplied Sciences2076-34172023-01-01133137010.3390/app13031370Investigations on Pressure Broadening Coefficients of NO Lines in the 1←0 Band for N<sub>2</sub>, CO<sub>2</sub>, Ar, H<sub>2</sub>, O<sub>2</sub> and HeSumit Agarwal0Leopold Seifert1Denghao Zhu2Bo Shu3Ravi Fernandes4Zhechao Qu5Department of Physical Chemistry, Physikalisch-Technische Bundesanstalt, 38116 Braunschweig, GermanyDepartment of Physical Chemistry, Physikalisch-Technische Bundesanstalt, 38116 Braunschweig, GermanyDepartment of Physical Chemistry, Physikalisch-Technische Bundesanstalt, 38116 Braunschweig, GermanyDepartment of Physical Chemistry, Physikalisch-Technische Bundesanstalt, 38116 Braunschweig, GermanyDepartment of Physical Chemistry, Physikalisch-Technische Bundesanstalt, 38116 Braunschweig, GermanyDepartment of Physical Chemistry, Physikalisch-Technische Bundesanstalt, 38116 Braunschweig, GermanyA 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<sup>−1</sup> and 1915.76 cm<sup>−1</sup> in the fundamental (1←0) band (R11.5 Ω1/2 and Ω3/2) for CO<sub>2</sub>, N<sub>2</sub>, Ar, O<sub>2</sub>, He, and H<sub>2</sub>. 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 N<sub>2</sub> and O<sub>2</sub> coefficients. The stated pressure-broadening coefficients for N<sub>2</sub>, CO<sub>2</sub>, Ar, H<sub>2</sub>, O<sub>2</sub>, He, and Air have relative errors in the 0.5–1.5% range. For CO<sub>2</sub> and H<sub>2,</sub> 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 O<sub>2</sub> and Air are in agreement with literature values, whereas results for Ar and He show larger differences.https://www.mdpi.com/2076-3417/13/3/1370absorption spectroscopybroadening coefficientNitric Oxideuncertainty |
| spellingShingle | Sumit Agarwal Leopold Seifert Denghao Zhu Bo Shu Ravi Fernandes Zhechao Qu Investigations on Pressure Broadening Coefficients of NO Lines in the 1←0 Band for N<sub>2</sub>, CO<sub>2</sub>, Ar, H<sub>2</sub>, O<sub>2</sub> and He Applied Sciences absorption spectroscopy broadening coefficient Nitric Oxide uncertainty |
| title | Investigations on Pressure Broadening Coefficients of NO Lines in the 1←0 Band for N<sub>2</sub>, CO<sub>2</sub>, Ar, H<sub>2</sub>, O<sub>2</sub> and He |
| title_full | Investigations on Pressure Broadening Coefficients of NO Lines in the 1←0 Band for N<sub>2</sub>, CO<sub>2</sub>, Ar, H<sub>2</sub>, O<sub>2</sub> and He |
| title_fullStr | Investigations on Pressure Broadening Coefficients of NO Lines in the 1←0 Band for N<sub>2</sub>, CO<sub>2</sub>, Ar, H<sub>2</sub>, O<sub>2</sub> and He |
| title_full_unstemmed | Investigations on Pressure Broadening Coefficients of NO Lines in the 1←0 Band for N<sub>2</sub>, CO<sub>2</sub>, Ar, H<sub>2</sub>, O<sub>2</sub> and He |
| title_short | Investigations on Pressure Broadening Coefficients of NO Lines in the 1←0 Band for N<sub>2</sub>, CO<sub>2</sub>, Ar, H<sub>2</sub>, O<sub>2</sub> and He |
| title_sort | investigations on pressure broadening coefficients of no lines in the 1 0 band for n sub 2 sub co sub 2 sub ar h sub 2 sub o sub 2 sub and he |
| topic | absorption spectroscopy broadening coefficient Nitric Oxide uncertainty |
| url | https://www.mdpi.com/2076-3417/13/3/1370 |
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