Infrared multiphoton dissociation of styrene ions by low-power continuous CO2 laser irradiation

Article abstract of DOI:10.1063/1.462860

The kinetics of infrared multiphoton dissociation of styrene ions under collision-free conditions in the ion cyclotron resonance ion trap were studied as a function of the intensity of the cw CO2 laser at powers up to 6 W.Following the beginning of irradiation an induction time was observed.Followed by dissociation according to a first-order rate constant.The kinetics could be fitted to a random-walk simulation of a master-equation model, in the same way as previous studies.A matrix-algebra solution of the master-equation model is described which gave a better fit with greater computational convenience.From the modeling the rate of radiation of infrared photons (assumed to be at 940 cm^-1) from the ions was estimated as 350 s^-1 at an ion internal energy of around 3 eV.When the dissociation threshold E, was treated as an unknown it was found that master-equation modeling of the kinetic results could give an estimate of E_t, but with large uncertainty.Application of simple thermal kinetic theory via Tolman's theorem gave good qualitative understanding of the results, and predicted the intensity dependence of the dissociation rate with a deviation of about 30percent.

Full text of DOI:10.1063/1.462860

Infrared multiphoton dissociation of styrene ions by lowpower continuous CO2
laser irradiation
Robert C. Dunbar and Rebecca C. Zaniewski
Citation: The Journal of Chemical Physics 96, 5069 (1992); doi: 10.1063/1.462860
View online: http://dx.doi.org/10.1063/1.462860
View Table of Contents: http://scitation.aip.org/content/aip/journal/jcp/96/7?ver=pdfcov
Published by the AIP Publishing
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This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
28.42.202.150 On: Sun, 23 Nov 2014 22:44:36
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This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
28.42.202.150 On: Sun, 23 Nov 2014 22:44:36
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This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
28.42.202.150 On: Sun, 23 Nov 2014 22:44:36
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This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
28.42.202.150 On: Sun, 23 Nov 2014 22:44:36
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This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
28.42.202.150 On: Sun, 23 Nov 2014 22:44:36
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This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
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