Dissociation dynamics of CH4+ core ion in the 2A1 state

Article abstract of DOI:10.1063/1.467653

Threshold-photoelectron photoion coincidence (TPEPICO) spectra of CH4 have been observed with synchrotron radiation at the excitation to the ²A₁ (υ₁=0-3) ionic states as well as to the 4pt₂ Rydberg (υ₁ = 0-4) states.In all the TPEPICO spectra observed, the CH3⁺ band shape was almost rectangular, which suggests that the translational and internal energy distributions of CH3⁺ are very narrow.The total kinetic energy releases (KERs) have been estimated from the CH3⁺ band shape.As a result, it was found that the CH3⁺ species were in an electronically excited state.There was a narrow distribution of the total KERs and similarity in the TPEPICO CH3⁺ band shapes between the spectra at the ²A₁ ionic state and the 4pt₂ Rydberg state excitations, which led to the conclusion that the Rydberg electron is just a spectator and the dissociation of the core ion plays an important role in dissociation through the 4pt₂ Rydberg state.Similar results have also been obtained for CH2⁺ and CH⁺ productions.However, on the other hand, an H⁺ fragment has been observed only at the ²A₁ state excitation.It showed a band with a long tail in the slower flight time region.The total average KERs and the decay rates have been estimated from band shape simulation.From these results, it has been found that a dissociation limit of the H⁺ ion exists just below the ²A₁ ionic state.The dissociation mechanisms through the 4pt₂ Rydberg state have been discussed in detail in comparison with those of the ²A₁ ionic state.

Full text of DOI:10.1063/1.467653

Dissociation dynamics of CH+ 4 core ion in the 2 A 1 state
Kenji Furuya, Katsumi Kimura, Yasuhiro Sakai, Toshinobu Takayanagi, and Nobuaki Yonekura
Citation: The Journal of Chemical Physics 101, 2720 (1994); doi: 10.1063/1.467653
View online: http://dx.doi.org/10.1063/1.467653
View Table of Contents: http://scitation.aip.org/content/aip/journal/jcp/101/4?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:
130.102.42.98 On: Sat, 22 Nov 2014 15:02:49

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:
130.102.42.98 On: Sat, 22 Nov 2014 15:02:49

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:
130.102.42.98 On: Sat, 22 Nov 2014 15:02:49

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:
130.102.42.98 On: Sat, 22 Nov 2014 15:02:49

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:
130.102.42.98 On: Sat, 22 Nov 2014 15:02:49

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:
130.102.42.98 On: Sat, 22 Nov 2014 15:02:49

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:
130.102.42.98 On: Sat, 22 Nov 2014 15:02:49

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:
130.102.42.98 On: Sat, 22 Nov 2014 15:02:49