The kinetic energy of PAH dication and trication dissociation determined by recoil-frame covariance map imagingShow others and affiliations
2022 (English)In: Physical Chemistry, Chemical Physics - PCCP, ISSN 1463-9076, E-ISSN 1463-9084, Vol. 24, no 38, p. 23096-23105Article in journal (Refereed) Published
Abstract [en]
We investigated the dissociation of dications and trications of three polycyclic aromatic hydrocarbons (PAHs), fluorene, phenanthrene, and pyrene. PAHs are a family of molecules ubiquitous in space and involved in much of the chemistry of the interstellar medium. In our experiments, ions are formed by interaction with 30.3 nm extreme ultraviolet (XUV) photons, and their velocity map images are recorded using a PImMS2 multi-mass imaging sensor. Application of recoil-frame covariance analysis allows the total kinetic energy release (TKER) associated with multiple fragmentation channels to be determined to high precision, ranging 1.94-2.60 eV and 2.95-5.29 eV for the dications and trications, respectively. Experimental measurements are supported by Born-Oppenheimer molecular dynamics (BOMD) simulations.
Place, publisher, year, edition, pages
Royal Society of Chemistry (RSC) , 2022. Vol. 24, no 38, p. 23096-23105
Keywords [en]
Kinetic energy, Kinetics, Molecular dynamics, Polycyclic aromatic hydrocarbons, Covariance analysis, Dications, Extreme Ultraviolet, Fluorenes, Imaging sensors, Interstellar medias, Kinetic energy release, Map image, Total kinetic energy, Velocity maps, Dissociation
National Category
Atom and Molecular Physics and Optics
Identifiers
URN: urn:nbn:se:kth:diva-326471DOI: 10.1039/d2cp02252dISI: 000830420400001PubMedID: 35876592Scopus ID: 2-s2.0-85135261689OAI: oai:DiVA.org:kth-326471DiVA, id: diva2:1757278
Note
QC 20230516
2023-05-162023-05-162023-05-16Bibliographically approved