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)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1442325
- author
- Alwahabi, Z. T.
; Zetterberg, Johan
LU
; Li, Zhongshan
LU
and Aldén, Marcus
LU
- organization
- publishing date
- 2009
- 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
- 2016-04-01 13:44:06
- date last changed
- 2022-04-21 23:15:45
@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}},
keywords = {{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}},
doi = {{10.1016/j.chemphys.2009.03.008}},
volume = {{359}},
year = {{2009}},
}