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Issue 39, 2009
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Multiphoton ionization/dissociation dynamics of formyl fluoride by velocity mapping ion imaging

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Abstract

The dissociation dynamics of HFCO+ ion has been studied using the velocity map ion imaging technique. The HFCO+ ion is prepared by one-photon resonant three-photon ionization in the region of 43100–43860 cm−1 excitation energy. The HFCO+ ions, produced by multiphoton ionization, have sufficient internal energy to dissociate into the F and HCO+ fragments without further absorption of another photon. Images of HCO+ have been recorded at various excitation energies. It is noticed that the angular distributions of HCO+ change dramatically from parallel distribution to perpendicular distribution and then back to parallel distribution in a very narrow excitation energy region of 43 473–43 500 cm−1. Analysis of anisotropy parameters of βn (n = 2, 4 and 6) reveals that the electronic states in the three-photon excitation of HFCO are mainly: HFCO(X1A′) → HFCO(A1A″) → HFCO(A′) → HFCO+(A2A″;B2A′). The purely perpendicular resonant transitions are likely responsible for the perpendicular angular distribution of the HCO+ ion fragment.

Graphical abstract: Multiphoton ionization/dissociation dynamics of formyl fluoride by velocity mapping ion imaging

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Publication details

The article was received on 23 Feb 2009, accepted on 15 Jun 2009 and first published on 30 Jul 2009


Article type: Paper
DOI: 10.1039/B903688A
Phys. Chem. Chem. Phys., 2009,11, 8733-8740

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    Multiphoton ionization/dissociation dynamics of formyl fluoride by velocity mapping ion imaging

    F. Wang, Y. Zhang, H. Wang, J. Liu, B. Jiang, X. Wang and X. Yang, Phys. Chem. Chem. Phys., 2009, 11, 8733
    DOI: 10.1039/B903688A

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