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2015 (English)In: Physical Review A. Atomic, Molecular, and Optical Physics, ISSN 1050-2947, E-ISSN 1094-1622, Vol. 92, no 5, article id 050702Article in journal (Refereed) Published
Abstract [en]
A recent study of soft x-ray absorption in native and hydrogenated coronene cations, C24H12+m + m = 0-7, led to the conclusion that additional hydrogen atoms protect (interstellar) polycyclic aromatic hydrocarbon (PAH) molecules from fragmentation [Reitsma et al., Phys. Rev. Lett. 113, 053002 (2014)]. The present experiment with collisions between fast (30-200 eV) He atoms and pyrene (C16H10+m +, m = 0, 6, and 16) and simulations without reference to the excitation method suggests the opposite. We find that the absolute carbon-backbone fragmentation cross section does not decrease but increases with the degree of hydrogenation for pyrene molecules.
National Category
Physical Sciences
Research subject
Physics
Identifiers
urn:nbn:se:su:diva-124759 (URN)10.1103/PhysRevA.92.050702 (DOI)000364807900001 ()2-s2.0-84948452202 (Scopus ID)
2016-01-122016-01-042022-10-14Bibliographically approved