Infrared-Ultraviolet Double-Resonance Measurements on the Temperature Dependence of Relaxation from Specific Rovibronic Levels in NO(X2.PI., .nu. = 2, J) and (X2.PI., .nu.=3, J)

Hdl Handle:
http://hdl.handle.net/10149/98614
Title:
Infrared-Ultraviolet Double-Resonance Measurements on the Temperature Dependence of Relaxation from Specific Rovibronic Levels in NO(X2.PI., .nu. = 2, J) and (X2.PI., .nu.=3, J)
Authors:
Frost, M. J. (Michael); Islam, M. (Meezanul); Smith, I. W. M. (Ian)
Affiliation:
The University of Birmingham. School of Chemistry.
Citation:
Frost, M. J., Islam, M. and Smith, I. W. M. (1994) 'Infrared-Ultraviolet Double-Resonance Measurements on the Temperature Dependence of Relaxation from Specific Rovibronic Levels in NO(X2.PI., .nu. = 2, J) and (X2.PI., .nu.=3, J)', Canadian Journal of Chemistry, 72 (3), pp.606-611.
Publisher:
National Research Council Canada
Journal:
Canadian Journal of Chemistry
Issue Date:
Mar-1994
URI:
http://hdl.handle.net/10149/98614
DOI:
10.1139/v94-084
Abstract:
Infrared-ultraviolet double resonance experiments have been performed to measure the rates of rotational and vibrational self-relaxation in NO at three temperatures: 295 K, 200 K, and 77 K. Pulses of tunable infrared radiation from an optical parameteric oscillator have been used to excite molecules into selected rotational levels (j = 0.5, 6.5, or 15.5) in the \nu = 2; Omega = 1/2] vibronic component of the X(2)II electronic ground state of NO. Loss of population from the initially excited level was observed by making time-resolved laser-induced fluorescence measurements on appropriate lines in the A(2) Sigma(+) - X(2)II(2,2) band. The rate constants for removal of population from specific rovibronic levels are essentially independent of j and at 295 K agree well with previous direct measurements on a range of nu, j levels. The rotationally thermalized population in nu = 2 relaxes by vibration-vibration (V-V) energy exchange, NO(nu = 2) + NO(nu = 0) --> 2 NO(nu = 1), at a rate which is almost independent of temperature and which seems to be uninfluenced by the presence of spin-orbit degeneracy in, and attractive forces between, the NO collision partners.
Type:
Article
Language:
en
Keywords:
energy-transfer rates; nitric-oxide dimer; excited acetylene; rate constants; spin-orbit; degrees k; NO; collisions; states; CO
ISSN:
0008-4042
Rights:
Subject to restrictions, author can archive publisher's version/PDF. For full details see http://www.sherpa.ac.uk/romeo/ [Accessed 12/05/2010]
Citation Count:
17 [Web of Science, 12/05/2010]

Full metadata record

DC FieldValue Language
dc.contributor.authorFrost, M. J. (Michael)en
dc.contributor.authorIslam, M. (Meezanul)en
dc.contributor.authorSmith, I. W. M. (Ian)en
dc.date.accessioned2010-05-12T12:56:04Z-
dc.date.available2010-05-12T12:56:04Z-
dc.date.issued1994-03-
dc.identifier.citationCanadian Journal of Chemistry; 72(3):606-611en
dc.identifier.issn0008-4042-
dc.identifier.doi10.1139/v94-084-
dc.identifier.urihttp://hdl.handle.net/10149/98614-
dc.description.abstractInfrared-ultraviolet double resonance experiments have been performed to measure the rates of rotational and vibrational self-relaxation in NO at three temperatures: 295 K, 200 K, and 77 K. Pulses of tunable infrared radiation from an optical parameteric oscillator have been used to excite molecules into selected rotational levels (j = 0.5, 6.5, or 15.5) in the \nu = 2; Omega = 1/2] vibronic component of the X(2)II electronic ground state of NO. Loss of population from the initially excited level was observed by making time-resolved laser-induced fluorescence measurements on appropriate lines in the A(2) Sigma(+) - X(2)II(2,2) band. The rate constants for removal of population from specific rovibronic levels are essentially independent of j and at 295 K agree well with previous direct measurements on a range of nu, j levels. The rotationally thermalized population in nu = 2 relaxes by vibration-vibration (V-V) energy exchange, NO(nu = 2) + NO(nu = 0) --> 2 NO(nu = 1), at a rate which is almost independent of temperature and which seems to be uninfluenced by the presence of spin-orbit degeneracy in, and attractive forces between, the NO collision partners.en
dc.language.isoenen
dc.publisherNational Research Council Canadaen
dc.rightsSubject to restrictions, author can archive publisher's version/PDF. For full details see http://www.sherpa.ac.uk/romeo/ [Accessed 12/05/2010]en
dc.subjectenergy-transfer ratesen
dc.subjectnitric-oxide dimeren
dc.subjectexcited acetyleneen
dc.subjectrate constantsen
dc.subjectspin-orbiten
dc.subjectdegrees ken
dc.subjectNOen
dc.subjectcollisionsen
dc.subjectstatesen
dc.subjectCOen
dc.titleInfrared-Ultraviolet Double-Resonance Measurements on the Temperature Dependence of Relaxation from Specific Rovibronic Levels in NO(X2.PI., .nu. = 2, J) and (X2.PI., .nu.=3, J)en
dc.typeArticleen
dc.contributor.departmentThe University of Birmingham. School of Chemistry.en
dc.identifier.journalCanadian Journal of Chemistryen
ref.citationcount17 [Web of Science, 12/05/2010]en
or.citation.harvardFrost, M. J., Islam, M. and Smith, I. W. M. (1994) 'Infrared-Ultraviolet Double-Resonance Measurements on the Temperature Dependence of Relaxation from Specific Rovibronic Levels in NO(X2.PI., .nu. = 2, J) and (X2.PI., .nu.=3, J)', Canadian Journal of Chemistry, 72 (3), pp.606-611.-
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