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High resolution polarization spectroscopy and laser induced fluorescence of CO2 around 2 mu m

Alwahabi, Z. T. ; Zetterberg, Johan LU orcid ; Li, Zhongshan LU and Aldén, Marcus LU (2007) In European Physical Journal D. Atomic, Molecular, Optical and Plasma Physics 42(1). p.41-47
Abstract
High resolution Infrared Polarisation Spectroscopy (IRPS) and Infrared Laser Induced Fluorescence (IRLIF) techniques were used to probe CO2/N-2 binary gas mixture at atmospheric pressure and ambient temperature. The probed CO2 molecules were prepared by laser excitation to an overtone and combination ro-vibrational state (12(0)1, J = 15) of CO2, centred at 4988.6612 cm(-1). IRPS and IRLIF line profiles were recorded for several CO2/N-2 binary mixtures. The observed IRLIF line shapes have the expected Lorentzian form while the observed IRPS line shapes are narrower by a factor of two than those recorded with the IRLIF and appear to have a Lorentzian-cubed profile. The recorded line profiles provide measurements of the pressure-broadening... (More)
High resolution Infrared Polarisation Spectroscopy (IRPS) and Infrared Laser Induced Fluorescence (IRLIF) techniques were used to probe CO2/N-2 binary gas mixture at atmospheric pressure and ambient temperature. The probed CO2 molecules were prepared by laser excitation to an overtone and combination ro-vibrational state (12(0)1, J = 15) of CO2, centred at 4988.6612 cm(-1). IRPS and IRLIF line profiles were recorded for several CO2/N-2 binary mixtures. The observed IRLIF line shapes have the expected Lorentzian form while the observed IRPS line shapes are narrower by a factor of two than those recorded with the IRLIF and appear to have a Lorentzian-cubed profile. The recorded line profiles provide measurements of the pressure-broadening coefficient directly at atmospheric pressure. The Full-Width-Half-Maxima (FWHM) pressure broadening coefficients are measured, based on IRLIF, to be 0.2174 0.0092 cm(-1) atm(-1) and 0.1327 +/- 0.0077 cm(-1) atm(-1) for self- and N-2 collision broadening, respectively. The broadening coefficients obtained based on IRPS were measured to be similar to 8% larger than those obtained with IRLIF. (Less)
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author
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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
European Physical Journal D. Atomic, Molecular, Optical and Plasma Physics
volume
42
issue
1
pages
41 - 47
publisher
EDP Sciences
external identifiers
  • wos:000245788200005
  • scopus:33847688134
ISSN
1434-6060
DOI
10.1140/epjd/e2006-00275-y
language
English
LU publication?
yes
id
8f62dc63-4c29-437d-b4f8-9dfe0e6f824b (old id 666012)
date added to LUP
2016-04-01 17:08:20
date last changed
2022-01-29 00:39:11
@article{8f62dc63-4c29-437d-b4f8-9dfe0e6f824b,
  abstract     = {{High resolution Infrared Polarisation Spectroscopy (IRPS) and Infrared Laser Induced Fluorescence (IRLIF) techniques were used to probe CO2/N-2 binary gas mixture at atmospheric pressure and ambient temperature. The probed CO2 molecules were prepared by laser excitation to an overtone and combination ro-vibrational state (12(0)1, J = 15) of CO2, centred at 4988.6612 cm(-1). IRPS and IRLIF line profiles were recorded for several CO2/N-2 binary mixtures. The observed IRLIF line shapes have the expected Lorentzian form while the observed IRPS line shapes are narrower by a factor of two than those recorded with the IRLIF and appear to have a Lorentzian-cubed profile. The recorded line profiles provide measurements of the pressure-broadening coefficient directly at atmospheric pressure. The Full-Width-Half-Maxima (FWHM) pressure broadening coefficients are measured, based on IRLIF, to be 0.2174 0.0092 cm(-1) atm(-1) and 0.1327 +/- 0.0077 cm(-1) atm(-1) for self- and N-2 collision broadening, respectively. The broadening coefficients obtained based on IRPS were measured to be similar to 8% larger than those obtained with IRLIF.}},
  author       = {{Alwahabi, Z. T. and Zetterberg, Johan and Li, Zhongshan and Aldén, Marcus}},
  issn         = {{1434-6060}},
  language     = {{eng}},
  number       = {{1}},
  pages        = {{41--47}},
  publisher    = {{EDP Sciences}},
  series       = {{European Physical Journal D. Atomic, Molecular, Optical and Plasma Physics}},
  title        = {{High resolution polarization spectroscopy and laser induced fluorescence of CO2 around 2 mu m}},
  url          = {{http://dx.doi.org/10.1140/epjd/e2006-00275-y}},
  doi          = {{10.1140/epjd/e2006-00275-y}},
  volume       = {{42}},
  year         = {{2007}},
}