Infrared Line Collisional Parameters of PH<sub>3</sub> in Hydrogen: Measurements with Second-order Approximation of Perturbation Theory

Jamel Salem; Rached Ben Younes

doi:doi:10.11648/j.sjc.20200805.15

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Infrared Line Collisional Parameters of PH₃ in Hydrogen: Measurements with Second-order Approximation of Perturbation Theory

Jamel Salem, Rached Ben Younes

Published in Science Journal of Chemistry (Volume 8, Issue 5)

Received: 24 March 2020 Accepted: 24 August 2020 Published: 26 October 2020

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Abstract

Measurement of room temperature absorption by PH₃–H₂ mixtures in the v₂ and v₄ bands of phosphine (PH₃) have been made for low pressures. Fits of these spectra are made for the determination of the width for isolated lines, and line mixing in first-order Rosenkranz approximation. From the previous determinations, we deduce some remarks on the lack of accuracy for the prediction of the collisional process. With the first-order Rosenkranz approximation, the collisional parameters are considered linear with pressure. In this work, we have considered some spectra recorded for three doublets A₁ and A₂ lines in the v₂ and v₄ bands of PH₃ diluted with higher H₂ pressure. We show that the line shifts are non-linear with perturber pressures, which requires testing the fits of the recorded spectra by profiles developed in the second-order approximation of the perturbation theory. Consequently, the first and second-order mixing coefficients are determined and discussed. Also, through this study, we show that the change of the intensities distribution is provided by the populations exchange between the low energy levels for the two components of doublets A₁ and A₂ lines and is described through the second-order mixing parameter. Thereby, we show the mixing effect on the line width.

Published in	Science Journal of Chemistry (Volume 8, Issue 5)
DOI	10.11648/j.sjc.20200805.15
Page(s)	124-130
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2020. Published by Science Publishing Group

Keywords

Phosphine, Hydrogen, Collisional Parameters, Infrared, Second-order Approximation

References

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APA Style

Jamel Salem, Rached Ben Younes. (2020). Infrared Line Collisional Parameters of PH3 in Hydrogen: Measurements with Second-order Approximation of Perturbation Theory. Science Journal of Chemistry, 8(5), 124-130. https://doi.org/10.11648/j.sjc.20200805.15

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ACS Style

Jamel Salem; Rached Ben Younes. Infrared Line Collisional Parameters of PH3 in Hydrogen: Measurements with Second-order Approximation of Perturbation Theory. Sci. J. Chem. 2020, 8(5), 124-130. doi: 10.11648/j.sjc.20200805.15

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AMA Style

Jamel Salem, Rached Ben Younes. Infrared Line Collisional Parameters of PH3 in Hydrogen: Measurements with Second-order Approximation of Perturbation Theory. Sci J Chem. 2020;8(5):124-130. doi: 10.11648/j.sjc.20200805.15

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@article{10.11648/j.sjc.20200805.15,
  author = {Jamel Salem and Rached Ben Younes},
  title = {Infrared Line Collisional Parameters of PH3 in Hydrogen: Measurements with Second-order Approximation of Perturbation Theory},
  journal = {Science Journal of Chemistry},
  volume = {8},
  number = {5},
  pages = {124-130},
  doi = {10.11648/j.sjc.20200805.15},
  url = {https://doi.org/10.11648/j.sjc.20200805.15},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.sjc.20200805.15},
  abstract = {Measurement of room temperature absorption by PH3–H2 mixtures in the v2 and v4 bands of phosphine (PH3) have been made for low pressures. Fits of these spectra are made for the determination of the width for isolated lines, and line mixing in first-order Rosenkranz approximation. From the previous determinations, we deduce some remarks on the lack of accuracy for the prediction of the collisional process. With the first-order Rosenkranz approximation, the collisional parameters are considered linear with pressure. In this work, we have considered some spectra recorded for three doublets A1 and A2 lines in the v2 and v4 bands of PH3 diluted with higher H2 pressure. We show that the line shifts are non-linear with perturber pressures, which requires testing the fits of the recorded spectra by profiles developed in the second-order approximation of the perturbation theory. Consequently, the first and second-order mixing coefficients are determined and discussed. Also, through this study, we show that the change of the intensities distribution is provided by the populations exchange between the low energy levels for the two components of doublets A1 and A2 lines and is described through the second-order mixing parameter. Thereby, we show the mixing effect on the line width.},
 year = {2020}
}

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TY  - JOUR
T1  - Infrared Line Collisional Parameters of PH3 in Hydrogen: Measurements with Second-order Approximation of Perturbation Theory
AU  - Jamel Salem
AU  - Rached Ben Younes
Y1  - 2020/10/26
PY  - 2020
N1  - https://doi.org/10.11648/j.sjc.20200805.15
DO  - 10.11648/j.sjc.20200805.15
T2  - Science Journal of Chemistry
JF  - Science Journal of Chemistry
JO  - Science Journal of Chemistry
SP  - 124
EP  - 130
PB  - Science Publishing Group
SN  - 2330-099X
UR  - https://doi.org/10.11648/j.sjc.20200805.15
AB  - Measurement of room temperature absorption by PH3–H2 mixtures in the v2 and v4 bands of phosphine (PH3) have been made for low pressures. Fits of these spectra are made for the determination of the width for isolated lines, and line mixing in first-order Rosenkranz approximation. From the previous determinations, we deduce some remarks on the lack of accuracy for the prediction of the collisional process. With the first-order Rosenkranz approximation, the collisional parameters are considered linear with pressure. In this work, we have considered some spectra recorded for three doublets A1 and A2 lines in the v2 and v4 bands of PH3 diluted with higher H2 pressure. We show that the line shifts are non-linear with perturber pressures, which requires testing the fits of the recorded spectra by profiles developed in the second-order approximation of the perturbation theory. Consequently, the first and second-order mixing coefficients are determined and discussed. Also, through this study, we show that the change of the intensities distribution is provided by the populations exchange between the low energy levels for the two components of doublets A1 and A2 lines and is described through the second-order mixing parameter. Thereby, we show the mixing effect on the line width.
VL  - 8
IS  - 5
ER  -

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Author Information

Jamel Salem

Department of Physics, Faculty of Science of Gafsa, University of Gafsa, Gafsa, Tunisia
Rached Ben Younes

Department of Physics, Faculty of Science of Gafsa, University of Gafsa, Gafsa, Tunisia

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Plain Text BibTeX RIS

APA Style

Jamel Salem, Rached Ben Younes. (2020). Infrared Line Collisional Parameters of PH3 in Hydrogen: Measurements with Second-order Approximation of Perturbation Theory. Science Journal of Chemistry, 8(5), 124-130. https://doi.org/10.11648/j.sjc.20200805.15

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ACS Style

Jamel Salem; Rached Ben Younes. Infrared Line Collisional Parameters of PH3 in Hydrogen: Measurements with Second-order Approximation of Perturbation Theory. Sci. J. Chem. 2020, 8(5), 124-130. doi: 10.11648/j.sjc.20200805.15

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AMA Style

Jamel Salem, Rached Ben Younes. Infrared Line Collisional Parameters of PH3 in Hydrogen: Measurements with Second-order Approximation of Perturbation Theory. Sci J Chem. 2020;8(5):124-130. doi: 10.11648/j.sjc.20200805.15

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@article{10.11648/j.sjc.20200805.15,
  author = {Jamel Salem and Rached Ben Younes},
  title = {Infrared Line Collisional Parameters of PH3 in Hydrogen: Measurements with Second-order Approximation of Perturbation Theory},
  journal = {Science Journal of Chemistry},
  volume = {8},
  number = {5},
  pages = {124-130},
  doi = {10.11648/j.sjc.20200805.15},
  url = {https://doi.org/10.11648/j.sjc.20200805.15},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.sjc.20200805.15},
  abstract = {Measurement of room temperature absorption by PH3–H2 mixtures in the v2 and v4 bands of phosphine (PH3) have been made for low pressures. Fits of these spectra are made for the determination of the width for isolated lines, and line mixing in first-order Rosenkranz approximation. From the previous determinations, we deduce some remarks on the lack of accuracy for the prediction of the collisional process. With the first-order Rosenkranz approximation, the collisional parameters are considered linear with pressure. In this work, we have considered some spectra recorded for three doublets A1 and A2 lines in the v2 and v4 bands of PH3 diluted with higher H2 pressure. We show that the line shifts are non-linear with perturber pressures, which requires testing the fits of the recorded spectra by profiles developed in the second-order approximation of the perturbation theory. Consequently, the first and second-order mixing coefficients are determined and discussed. Also, through this study, we show that the change of the intensities distribution is provided by the populations exchange between the low energy levels for the two components of doublets A1 and A2 lines and is described through the second-order mixing parameter. Thereby, we show the mixing effect on the line width.},
 year = {2020}
}

Copy | Download

TY  - JOUR
T1  - Infrared Line Collisional Parameters of PH3 in Hydrogen: Measurements with Second-order Approximation of Perturbation Theory
AU  - Jamel Salem
AU  - Rached Ben Younes
Y1  - 2020/10/26
PY  - 2020
N1  - https://doi.org/10.11648/j.sjc.20200805.15
DO  - 10.11648/j.sjc.20200805.15
T2  - Science Journal of Chemistry
JF  - Science Journal of Chemistry
JO  - Science Journal of Chemistry
SP  - 124
EP  - 130
PB  - Science Publishing Group
SN  - 2330-099X
UR  - https://doi.org/10.11648/j.sjc.20200805.15
AB  - Measurement of room temperature absorption by PH3–H2 mixtures in the v2 and v4 bands of phosphine (PH3) have been made for low pressures. Fits of these spectra are made for the determination of the width for isolated lines, and line mixing in first-order Rosenkranz approximation. From the previous determinations, we deduce some remarks on the lack of accuracy for the prediction of the collisional process. With the first-order Rosenkranz approximation, the collisional parameters are considered linear with pressure. In this work, we have considered some spectra recorded for three doublets A1 and A2 lines in the v2 and v4 bands of PH3 diluted with higher H2 pressure. We show that the line shifts are non-linear with perturber pressures, which requires testing the fits of the recorded spectra by profiles developed in the second-order approximation of the perturbation theory. Consequently, the first and second-order mixing coefficients are determined and discussed. Also, through this study, we show that the change of the intensities distribution is provided by the populations exchange between the low energy levels for the two components of doublets A1 and A2 lines and is described through the second-order mixing parameter. Thereby, we show the mixing effect on the line width.
VL  - 8
IS  - 5
ER  -

Copy | Download