Multiple ionization and fragmentation of isolated pyrene and coronene molecules in collision with ions

Journal Article · Tue Feb 15 00:00:00 EST 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.83.022704· OSTI ID:21537158

Lawicki, A; Rousseau, P; Capron, M; Maisonny, R; Maclot, S; Adoui, L; Huber, B A ^[1]; Holm, A I. S.; Seitz, F; Johansson, H A. B.; Rosen, S; Schmidt, H T; Zettergren, H; Cederquist, H ^[2]; Manil, B ^[3]

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1. CIMAP (UMR 6252, CEA/CNRS/ENSICAEN/Universite de Caen Basse-Normandie), Boulevard Henri Becquerel, BP5133, F-14070 Caen Cedex 5 (France)
2. Department of Physics, Stockholm University, AlbaNova University Center, S-10691 Stockholm (Sweden)
3. Laboratoire de Physique des Lasers (UMR 7538, CNRS/Universite Paris 13/Institut Galilee), 99 Avenue J. B. Clement, F-93430 Villetaneuse (France)

The interaction of multiply charged ions (He{sup 2+}, O{sup 3+}, and Xe{sup 20+}) with gas-phase pericondensed polycyclic aromatic hydrocarbon (PAH) molecules of coronene (C{sub 24}H{sub 12}) and pyrene (C{sub 16}H{sub 10}) is studied for low-velocity collisions (v{<=}0.6 a.u.). The mass spectrometric analysis shows that singly and up to quadruply charged intact molecules are important reaction products. The relative experimental yields are compared with the results of a simple classical over-the-barrier model. For higher molecular charge states, the experimental yields decrease much more strongly than the model predictions due to the instabilities of the multiply charged PAH molecules. Even-odd oscillations with the number of carbon atoms, n, in the intensity distributions of the C{sub n}H{sub x}{sup +} fragments indicate a linear chain structure of the fragments similar to those observed for ion-C{sub 60} collisions. The latter oscillations are known to be due to dissociation energy differences between even- and odd-n C{sub n}-chain molecules. For PAH molecules, the average numbers of H atoms attached to the C{sub n}H{sub x} chains are larger for even-n reflecting acetylenic bond systems.

• OSTI ID: 21537158
• Journal Information: Physical Review. A, Vol. 83, Issue 2; Other Information: DOI: 10.1103/PhysRevA.83.022704; (c) 2011 American Institute of Physics; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
CARBON
CHARGE STATES
DISSOCIATION ENERGY
FRAGMENTATION
FULLERENES
HELIUM IONS
INSTABILITY
ION COLLISIONS
IONIZATION
MASS SPECTROSCOPY
OSCILLATIONS
OXYGEN IONS
POLYCYCLIC AROMATIC HYDROCARBONS
PYRENE
XENON IONS
AROMATICS
CHARGED PARTICLES
COLLISIONS
CONDENSED AROMATICS
ELEMENTS
ENERGY
HYDROCARBONS
IONS
NONMETALS
ORGANIC COMPOUNDS
SPECTROSCOPY