Translational energy distributions and angular difference Doppler profiles of the excited hydrogen atom produced in e-C2H4 collisions: Dissociation dynamics of ethylene

Article abstract of DOI:10.1063/1.463689

Formation of an excited hydrogen atom (H^*) through electron-impact dissociation of ethylene has been investigate by measuring Doppler profiles of the Balmer-β line and their angular dependence at an optical resolution of 0.007 nm.The Doppler profiles show a clear anisotropy.The translational energy distribution (TED) and the angular difference Doppler profile were obtained.There are four major dissociation processes for the formation of H^* (n = 4).Component 1 has a peak of TED at 1 eV, is produced in a perpendicular distribution, and should be produced by predissociation through the Rydberg states converging to the (1b_1u)^-1 state.Component 2 has a peak of TED at 1.8 eV, is produced in a parallel distribution, and should be produced through the Rydberg states converging to the (2a_g)^-1 state.Component 3 has a peak of TED at 2-6 eV and is produced in a parallel distribution.Component 4 has a peak of TED at 5-10 eV.Molecular orientation at the time of excitation was estimated; the molecular plane is perpendicular to the electron beam for component 1, and the C=C bond is perpendicular and the molecular plane is parallel to the electron beam for components 2 and 3.The asymmetry parameters of components 2 and 3 were < 0.2: these values were much smaller than anticipated due largely to molecular rotation and deformation at the time of dissociation.

Full text of DOI:10.1063/1.463689

Translational energy distributions and angular difference Doppler profiles of the
excited hydrogen atom produced in eC2H4 collisions: Dissociation dynamics of
ethylene
Nobuaki Yonekura, Keiji Nakashima, and Teiichiro Ogawa
Citation: The Journal of Chemical Physics 97, 6276 (1992); doi: 10.1063/1.463689
View online: http://dx.doi.org/10.1063/1.463689
View Table of Contents: http://scitation.aip.org/content/aip/journal/jcp/97/9?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:
29.24.51.181 On: Sat, 22 Nov 2014 10:15:38
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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:
29.24.51.181 On: Sat, 22 Nov 2014 10:15:38
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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:
29.24.51.181 On: Sat, 22 Nov 2014 10:15:38
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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:
29.24.51.181 On: Sat, 22 Nov 2014 10:15:38
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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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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:
29.24.51.181 On: Sat, 22 Nov 2014 10:15:38
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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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