Nondissociative one-photon ionization of clusters--is it possible?

Tomas Baer; Jon A. Booze; John S. Riley

doi:10.1117/12.143081

22 April 1993 Nondissociative one-photon ionization of clusters--is it possible?

Tomas Baer, Jon A. Booze, John S. Riley

Proceedings Volume 1858, Laser Techniques for State-Selected and State-to-State Chemistry; (1993) https://doi.org/10.1117/12.143081
Event: OE/LASE'93: Optics, Electro-Optics, and Laser Applications in Scienceand Engineering, 1993, Los Angeles, CA, United States

Abstract

A new experimental technique, based on high resolution time of flight analysis of ions, has demonstrated that one photon ionization of dimers, trimers, and tetramers, is accompanied by dissociation of the cluster ion to form either clusters of lower order, new ion structures, or other products formed by intra-cluster ion molecule reactions. The method is based measuring the inevitable kinetic energy released in the dissociation process. By maintaining a low electric field across the ionization region, and optimizing the instrumental parameters, it is possible to measure kinetic energy releases as low as 2 meV. Examples of systems investigated include clusters of acetylene, ethylene, NO, CH₃OH, CH₃SH, CH₃Cl, and C₂H₅Cl. The results showed that even at the lowest photon energies used, ionization without dissociation consisted of at most 5% of the total signal. In some ions, such as C₂H₂ clusters, 100% of the one photon ionization process is via dissociation.

Citation Download Citation

Tomas Baer, Jon A. Booze, and John S. Riley "Nondissociative one-photon ionization of clusters--is it possible?", Proc. SPIE 1858, Laser Techniques for State-Selected and State-to-State Chemistry, (22 April 1993); https://doi.org/10.1117/12.143081

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