TY  - JOUR
AU  - Garg, Diksha
AU  - Lee, Jason Wai Lung
AU  - Tikhonov, Denis
AU  - Chopra, Pragya
AU  - Steber, Amanda
AU  - Lemmens, Alexander
AU  - Erk, Benjamin
AU  - Allum, Felix
AU  - Boll, Rebecca
AU  - Cheng, Xuemei
AU  - Duesterer, Stefan
AU  - Gruet, Sebastien Patrice
AU  - He, Lanhai
AU  - Heathcote, David
AU  - Johny, Melby
AU  - Mohammad Kazemi, Mehdi
AU  - Koeckert, Hansjochen
AU  - Lahl, Jan
AU  - Loru, Donatella
AU  - Maclot, Sylvain
AU  - Mason, Robert
AU  - Mueller, Erland
AU  - Mullins, Terence
AU  - Olshin, Pavel
AU  - Passow, Christopher
AU  - Peschel, Jasper
AU  - Ramm, Daniel
AU  - Rompotis, Dimitrios
AU  - Trippel, Sebastian
AU  - Wiese, Joss
AU  - Ziaee, Farzaneh
AU  - Bari, Sadia
AU  - Burt, Michael
AU  - Küpper, Jochen
AU  - Rijs, Anouk
AU  - Rolles, Daniel
AU  - Techert, Simone
AU  - Eng-Johnsson, Per
AU  - Brouard, Mark
AU  - Vallance, Claire
AU  - Manschwetus, Bastian
AU  - Schnell, Melanie
TI  - Fragmentation dynamics of fluorene explored using ultrafast XUV-Vis pump-probe spectroscopy
JO  - Frontiers in physics
VL  - 10
SN  - 2296-424X
CY  - Lausanne
PB  - Frontiers Media
M1  - PUBDB-2022-01289
SP  - 880793
PY  - 2022
AB  - We report on the use of extreme ultraviolet (XUV, 30.3 nm) radiation from the Free-electron LASer in Hamburg (FLASH) and visible (Vis, 405 nm) photons from an optical laser to investigate the relaxation and fragmentation dynamics of fluorene ions. The ultrashort laser pulses allow to resolve the molecular processes occurring on the femtosecond timescales. Fluorene is a prototypical small polycyclic aromatic hydrocarbon (PAH). Through their infrared emission signature, PAHs have been shown to be ubiquitous in the universe, and they are assumed to play an important role in the chemistry of the interstellar medium. Our experiments track the ionization and dissociative ionization products of fluorene through time-of-flight mass spectrometry and velocity-map imaging. Multiple processes involved in the formation of each of the fragment ions are disentangled through analysis of the ion images. The relaxation lifetimes of the excited fluorene monocation and dication obtained through the fragment formation channels are reported to be in the range of a few tens of femtoseconds to a few picoseconds.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000804771900001
DO  - DOI:10.3389/fphy.2022.880793
UR  - https://bib-pubdb1.desy.de/record/475232
ER  -