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Towards a complete description of multiple dissociation events: a photoion–photoneutral (pi-pn3) coincidence study of Ar4+

journal contribution
posted on 2023-06-07, 23:23 authored by P Jukes, A Buxey, A B Jones, A J Stace
By combining the techniques of ion and fast neutral detection into a single coincidence experiment, it is demonstrated that the scattering patterns of all the fragments from a multiple dissociation event can be correlated. The power of this new technique is demonstrated using Ar4+ as an example, where photoexcitation generates a total of 7 possible reaction products, each of which is, in theory, distinguishable by charge and/or kinetic energy. The two ionic products are Ar+ and Ar2+, and whilst the latter ion emerges with a low kinetic energy and is isotropically scattered, Ar+ has associated with it both a significant spread in laboratory-frame kinetic energy and features indicative of anisotropic scattering. By selecting an appropriate laboratory-frame kinetic energy for either ion, coincident neutrals can be identified and energy-analyzed using a time-of-flight technique. The method reveals the presence of two separate fragmentation channels, one of which is concerted and the other sequential.

History

Publication status

  • Published

Journal

Journal of Chemical Physics

ISSN

0021-9606

Publisher

American Institute of Physics

Issue

14

Volume

109

Page range

5803 - 5811

ISBN

0021-9606

Department affiliated with

  • Chemistry Publications

Full text available

  • No

Peer reviewed?

  • Yes

Legacy Posted Date

2012-02-06

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