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Collision-induced fundamental band of D2 in D2–N2 and D2–CO mixtures

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Title: Collision-induced fundamental band of D2 in D2–N2 and D2–CO mixtures
Authors: Varghese, G.1, Stamp, C.1, Reddy, S. Paddi spreddy@physics.mun.ca
Source: Journal of Quantitative Spectroscopy & Radiative Transfer. Sep2004, Vol. 87 Issue 3/4, p387-397. 11p.
Subjects: Infrared radiation, Mixtures, Absorption spectra, Spectrum analysis
Abstract: Enhancement spectra of the collision-induced absorption of the infrared fundamental band of D2 in D2–N2 and D2–CO binary mixtures were recorded at 298 K with an absorption cell of sample pathlength 105.2 cm. Five base densities of D2 in the range 12–20 amagat and several total gas densities of the mixtures up to 130 amagat were used. The observed spectra show the usual characteristic dip near the band origin Q1(0) of the Q branch with two well-resolved components QP and QR as well as the absorption peaks O1(3), O1(2) and S1(J), J=0 to 4. Binary and ternary absorption coefficients of the band arising from collisions of the type D2–X and D2–X–X, where X stands for N2 or CO, have been determined. The spectra are interpreted in terms of the overlap transitions Qov(J), J=0 to 4 and the following quadrupolar transitions of D2–N2 and D2–CO: O1(J)(D2)+Q0(J)(N2/CO); Q1(J)(D2)+Q0(J)(N2/CO); S1(J)(D2)+Q0(J)(N2/CO) and Q1(J)(D2)+S0(J)(N2/CO) with J=0 to 4 for D2 and J=0 to 25 for N2/CO. An analysis of the absorption profiles was carried out by assuming appropriate line shape functions for the short-range overlap and for long-range quadrupolar contributions. Characteristic half-width parameters δd and δc for the overlap-induced transitions and δq for the quadrupole-induced transitions were obtained from the profile analysis. Although CO has a small permanent electric dipole moment, present analysis does not indicate any detectable contribution from the electric dipolar induction mechanism in D2–CO mixtures. [Copyright &y& Elsevier]
Copyright of Journal of Quantitative Spectroscopy & Radiative Transfer is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
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  Data: Collision-induced fundamental band of <f>D<subscript>2</subscript></f> in <f>D<subscript>2</subscript></f>–<f>N<subscript>2</subscript></f> and <f>D<subscript>2</subscript></f>–CO mixtures
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  Data: <searchLink fieldCode="AR" term="%22Varghese%2C+G%2E%22">Varghese, G.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Stamp%2C+C%2E%22">Stamp, C.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Reddy%2C+S%2E+Paddi%22">Reddy, S. Paddi</searchLink><i> spreddy@physics.mun.ca</i>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Quantitative+Spectroscopy+%26+Radiative+Transfer%22">Journal of Quantitative Spectroscopy & Radiative Transfer</searchLink>. Sep2004, Vol. 87 Issue 3/4, p387-397. 11p.
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  Data: <searchLink fieldCode="DE" term="%22Infrared+radiation%22">Infrared radiation</searchLink><br /><searchLink fieldCode="DE" term="%22Mixtures%22">Mixtures</searchLink><br /><searchLink fieldCode="DE" term="%22Absorption+spectra%22">Absorption spectra</searchLink><br /><searchLink fieldCode="DE" term="%22Spectrum+analysis%22">Spectrum analysis</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: Enhancement spectra of the collision-induced absorption of the infrared fundamental band of <f>D2</f> in <f>D2</f>–<f>N2</f> and <f>D2</f>–CO binary mixtures were recorded at <f>298 K</f> with an absorption cell of sample pathlength <f>105.2 cm</f>. Five base densities of <f>D2</f> in the range 12–20 amagat and several total gas densities of the mixtures up to 130 amagat were used. The observed spectra show the usual characteristic dip near the band origin <f>Q1(0)</f> of the <f>Q</f> branch with two well-resolved components <f>QP</f> and <f>QR</f> as well as the absorption peaks <f>O1(3)</f>, <f>O1(2)</f> and <f>S1(J)</f>, <f>J=0</f> to 4. Binary and ternary absorption coefficients of the band arising from collisions of the type <f>D2</f>–X and <f>D2</f>–X–X, where X stands for <f>N2</f> or CO, have been determined. The spectra are interpreted in terms of the overlap transitions <f>Qov(J)</f>, <f>J=0</f> to 4 and the following quadrupolar transitions of <f>D2</f>–<f>N2</f> and <f>D2</f>–CO: <f>O1(J)(D2)+Q0(J)(N2/CO)</f>; <f>Q1(J)(D2)+Q0(J)(N2/CO)</f>; <f>S1(J)(D2)+Q0(J)(N2/CO)</f> and <f>Q1(J)(D2)+S0(J)(N2/CO)</f> with <f>J=0</f> to 4 for <f>D2</f> and <f>J=0</f> to 25 for <f>N2/CO</f>. An analysis of the absorption profiles was carried out by assuming appropriate line shape functions for the short-range overlap and for long-range quadrupolar contributions. Characteristic half-width parameters <f>δd</f> and <f>δc</f> for the overlap-induced transitions and <f>δq</f> for the quadrupole-induced transitions were obtained from the profile analysis. Although CO has a small permanent electric dipole moment, present analysis does not indicate any detectable contribution from the electric dipolar induction mechanism in <f>D2</f>–CO mixtures. [Copyright &y& Elsevier]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Quantitative Spectroscopy & Radiative Transfer is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1016/j.jqsrt.2004.03.014
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 11
        StartPage: 387
    Subjects:
      – SubjectFull: Infrared radiation
        Type: general
      – SubjectFull: Mixtures
        Type: general
      – SubjectFull: Absorption spectra
        Type: general
      – SubjectFull: Spectrum analysis
        Type: general
    Titles:
      – TitleFull: Collision-induced fundamental band of <f>D2</f> in <f>D2</f>–<f>N2</f> and <f>D2</f>–CO mixtures
        Type: main
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      – PersonEntity:
          Name:
            NameFull: Varghese, G.
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            NameFull: Stamp, C.
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            NameFull: Reddy, S. Paddi
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          Dates:
            – D: 01
              M: 09
              Text: Sep2004
              Type: published
              Y: 2004
          Identifiers:
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              Value: 00224073
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              Value: 87
            – Type: issue
              Value: 3/4
          Titles:
            – TitleFull: Journal of Quantitative Spectroscopy & Radiative Transfer
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