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Vibrational relaxation of CO2 (12(0)1) by argon

Alwahabi, Z. T.; Zetterberg, Johan LU ; Li, Zhongshan LU and Aldén, Marcus LU (2009) In Chemical Physics 359(1-3). p.71-76
Abstract
We present experimental measurements of the vibrational relaxation of CO2 (12(0)1) by argon, at ambient temperature (295 +/- 2 K). The CO2 molecules were directly excited to the (12(0)1, J = 14) ro-vibrational state by a tunable laser radiation at similar to 2 mu m. Time-resolved infrared fluorescence technique was used to study the collisional relaxation process. The bimolecular deactivation rate constant of CO2 (12(0)1) by argon was found to be (825 +/- 43 Torr(-1) s(-1)) while the self-deactivation by CO2 (00(0)0) was determined to be (3357 +/- 135 Torr(-1) s(-1)). The radiative life-time of the vibrational combination band (12(0)1), tau[CO2 (12(0)1)], was found to be (5.55 +/- 0.27) mu s. Modern angular momentum theory was used to... (More)
We present experimental measurements of the vibrational relaxation of CO2 (12(0)1) by argon, at ambient temperature (295 +/- 2 K). The CO2 molecules were directly excited to the (12(0)1, J = 14) ro-vibrational state by a tunable laser radiation at similar to 2 mu m. Time-resolved infrared fluorescence technique was used to study the collisional relaxation process. The bimolecular deactivation rate constant of CO2 (12(0)1) by argon was found to be (825 +/- 43 Torr(-1) s(-1)) while the self-deactivation by CO2 (00(0)0) was determined to be (3357 +/- 135 Torr(-1) s(-1)). The radiative life-time of the vibrational combination band (12(0)1), tau[CO2 (12(0)1)], was found to be (5.55 +/- 0.27) mu s. Modern angular momentum theory was used to explain values of the deactivation rate measured. It is concluded that the presence of the (08(0)0) state acts like an angular momentum sink leading to a fast deactivation rate of the CO2 (12(0)1) by argon. (C) 2009 Elsevier B.V. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Time-resolved IR fluorescence, Vibrational relaxation, Energy transfer
in
Chemical Physics
volume
359
issue
1-3
pages
71 - 76
publisher
Elsevier
external identifiers
  • wos:000266756400012
  • scopus:65449174971
ISSN
0301-0104
DOI
10.1016/j.chemphys.2009.03.008
language
English
LU publication?
yes
id
cbe82861-8104-4232-b21e-6015316f8381 (old id 1442325)
date added to LUP
2009-07-27 09:16:58
date last changed
2017-10-01 04:11:58
@article{cbe82861-8104-4232-b21e-6015316f8381,
  abstract     = {We present experimental measurements of the vibrational relaxation of CO2 (12(0)1) by argon, at ambient temperature (295 +/- 2 K). The CO2 molecules were directly excited to the (12(0)1, J = 14) ro-vibrational state by a tunable laser radiation at similar to 2 mu m. Time-resolved infrared fluorescence technique was used to study the collisional relaxation process. The bimolecular deactivation rate constant of CO2 (12(0)1) by argon was found to be (825 +/- 43 Torr(-1) s(-1)) while the self-deactivation by CO2 (00(0)0) was determined to be (3357 +/- 135 Torr(-1) s(-1)). The radiative life-time of the vibrational combination band (12(0)1), tau[CO2 (12(0)1)], was found to be (5.55 +/- 0.27) mu s. Modern angular momentum theory was used to explain values of the deactivation rate measured. It is concluded that the presence of the (08(0)0) state acts like an angular momentum sink leading to a fast deactivation rate of the CO2 (12(0)1) by argon. (C) 2009 Elsevier B.V. All rights reserved.},
  author       = {Alwahabi, Z. T. and Zetterberg, Johan and Li, Zhongshan and Aldén, Marcus},
  issn         = {0301-0104},
  keyword      = {Time-resolved IR fluorescence,Vibrational relaxation,Energy transfer},
  language     = {eng},
  number       = {1-3},
  pages        = {71--76},
  publisher    = {Elsevier},
  series       = {Chemical Physics},
  title        = {Vibrational relaxation of CO2 (12(0)1) by argon},
  url          = {http://dx.doi.org/10.1016/j.chemphys.2009.03.008},
  volume       = {359},
  year         = {2009},
}