The kinetic energy of PAH dication and trication dissociation determined by recoil-frame covariance map imaging

Abstract

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...

Coincidence mass spectrometry study of double ionization of pyrene by 70 eV electron impact

“…The maximum in Fig. 3 is at a slightly higher energy of 2.8 eV, possibly related to the higher electron impact energy of 70 eV as compared to the 40.9 eV photon energy used by Lee et al 25 We note that we have had to use the extended probability distribution in Fig. 3(a) to obtain a good agreement between Fig.…”

“…Theoretical calculations have also been reported in a number of experimental papers. 25,29–31,35–37,46–48,50…”

FLASH and the FLASH2020+ project—current status and upgrades for the free-electron laser in Hamburg at DESY

“…The astrochemistry community uses FLASH, to study how harsh, short wavelength radiation environment influences the chemical composition and abundance of molecules in space. Probing potential molecular reactions after irradiation with short wavelength pulses from FLASH thus generates insight into processes into the origins of molecules in the interstellar space [33,34].…”

Addressing electronic and dynamical evolution of molecules and molecular clusters: DFTB simulations of energy relaxation in polycyclic aromatic hydrocarbons

“…Experimentally, the fragmentation of PAHs resulting from UV irradiation or collision has been investigated evidencing the dominant H, H 2 and C 2 H 2 loss channels and characterizing the stability of excited PAHs. [58][59][60][61][62][63][64][65][66][67][68][69][70] Collision-or photon-induced fragmentation has also been characterized in PAH clusters. 71 These experiments have demonstrated that the resulting mass spectra and identified dissociation channels can be interpreted schematically as belonging to one of two typical scenarios (see reviews 11,72 ), namely statistical or non-statistical fragmentation patterns which are determined by the nature of the excitation and the characteristic timescales of energy redistribution.…”