Change search
ReferencesLink to record
Permanent link

Direct link
Ion-polycyclic aromatic hydrocarbon collisions: kinetic energy releases for specific fragmentation channels
Stockholm University, Faculty of Science, Department of Physics.
Show others and affiliations
2013 (English)In: Journal of Physics B: Atomic, Molecular and Optical Physics, ISSN 0953-4075, E-ISSN 1361-6455, Vol. 46, no 24, 245201- p.Article in journal (Refereed) Published
Abstract [en]

We report on 30 keV He2+ collisions with naphthalene (C10H8) molecules, which leads to very extensive fragmentation. To unravel such complex fragmentation patterns, we designed and constructed an experimental setup, which allows for the determination of the full momentum vector by measuring charged collision products in coincidence in a recoil ion momentum spectrometer type of detection scheme. The determination of fragment kinetic energies is found to be considerably more accurate than for the case of mere coincidence time-of-flight spectrometers. In fission reactions involving two cationic fragments, typically kinetic energy releases of 2-3 eV are observed. The results are interpreted by means of density functional theory calculations of the reverse barriers. It is concluded that naphthalene fragmentation by collisions with keV ions clearly is much more violent than the corresponding photofragmentation with energetic photons. The ion-induced naphthalene fragmentation provides a feedstock of various small hydrocarbonic species of different charge states and kinetic energy, which could influence several molecule formation processes in the cold interstellar medium and facilitates growth of small hydrocarbon species on pre-existing polycyclic aromatic hydrocarbons.

Place, publisher, year, edition, pages
2013. Vol. 46, no 24, 245201- p.
National Category
Physical Sciences
URN: urn:nbn:se:su:diva-98266DOI: 10.1088/0953-4075/46/24/245201ISI: 000328275700009OAI: diva2:686039


Available from: 2014-01-10 Created: 2014-01-03 Last updated: 2014-01-10Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Zettergren, Henning
By organisation
Department of Physics
In the same journal
Journal of Physics B: Atomic, Molecular and Optical Physics
Physical Sciences

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 12 hits
ReferencesLink to record
Permanent link

Direct link