Jump to main content
Jump to site search

Issue 40, 2014
Previous Article Next Article

Fragmentation of anthracene C14H10, acridine C13H9N and phenazine C12H8N2 ions in collisions with atoms

Author affiliations

Abstract

We report experimental total, absolute, fragmentation cross sections for anthracene C14H10, acridine C13H9N, and phenazine C12H8N2 ions colliding with He at center-of-mass energies close to 100 eV. In addition, we report results for the same ions colliding with Ne, Ar, and Xe at higher energies. The total fragmentation cross sections for these three ions are the same within error bars for a given target. The measured fragment mass distributions reveal significant contributions from both delayed (≫10−12 s) statistical fragmentation processes as well as non-statistical, prompt (∼10−15 s), single atom knockout processes. The latter dominate and are often followed by secondary statistical fragmentation. Classical Molecular Dynamics (MD) simulations yield separate cross sections for prompt and delayed fragmentation which are consistent with the experimental results. The intensity of the single C/N-loss peak, the signature of non-statistical fragmentation, decreases with the number of N atoms in the parent ion. The fragment intensity distributions for losses of more than one C or N atom are rather similar for C14H10 and C13H9N but differ strongly for C12H8N2 where weak C–N bonds often remain in the fragments after the first fragmentation step. This greatly increases their probability to fragment further. Distributions of internal energy remaining in the fragments after knockout are obtained from the MD simulations.

Graphical abstract: Fragmentation of anthracene C14H10, acridine C13H9N and phenazine C12H8N2 ions in collisions with atoms

Back to tab navigation

Supplementary files

Publication details

The article was received on 24 Jul 2014, accepted on 02 Sep 2014 and first published on 03 Sep 2014


Article type: Paper
DOI: 10.1039/C4CP03293D
Citation: Phys. Chem. Chem. Phys., 2014,16, 21980-21987
  •   Request permissions

    Fragmentation of anthracene C14H10, acridine C13H9N and phenazine C12H8N2 ions in collisions with atoms

    M. H. Stockett, M. Gatchell, J. D. Alexander, U. Bērziņš, T. Chen, K. Farid, A. Johansson, K. Kulyk, P. Rousseau, K. Støchkel, L. Adoui, P. Hvelplund, B. A. Huber, H. T. Schmidt, H. Zettergren and H. Cederquist, Phys. Chem. Chem. Phys., 2014, 16, 21980
    DOI: 10.1039/C4CP03293D

Search articles by author

Spotlight

Advertisements