Femtosecond x-ray photoelectron diffraction on gas-phase dibromobenzene molecules

ISSN
1361-6455
0953-4075
Date Issued
2014
Author(s)
Rolles, Daniel
Boll, Rebecca
Adolph, M.
Aquila, Andrew
Bostedt, C.
Bozek, John D.
Chapman, Henry N.
Coffee, Ryan
Coppola, Niccola
Decleva, P.
Delmas, T.
Epp, Sascha W.
Erk, Benjamin
Filsinger, Frank
Foucar, Lutz
Gumprecht, Lars
Hoemke, Andre
Gorkhover, Tais
Holmegaard, Lotte
Johnsson, Per
Kaiser, C. H.
Krasniqi, Faton
Kuehnel, K-U
Maurer, J.
Messerschmidt, Marc
Moshammer, Robert
Quevedo, Wilson
Rajkovic, Ivan
Rouzee, Arnaud
Rudek, Benedikt
Schlichting, Ilme
Schmidt, C.
Schorb, Sebastian
Schroeter, C. D.
Schulz, J.
Stapelfeldt, Henrik
Stener, Mauro
Stern, Stephan
Thogersen, Jan
Vrakking, Marc
Rudenko, A.
Kuepper, Jochen
Ullrich, Joachim
DOI
10.1088/0953-4075/47/12/124035
Abstract
We present time-resolved femtosecond photoelectron momentum images and angular distributions of dissociating, laser-aligned 1,4-dibromobenzene (C6H4Br2) molecules measured in a near-infrared pump, soft-x-ray probe experiment performed at an x-ray free-electron laser. The observed alignment dependence of the bromine 2p photoelectron angular distributions is compared to density functional theory calculations and interpreted in terms of photoelectron diffraction. While no clear time-dependent effects are observed in the angular distribution of the Br(2p) photoelectrons, other, low-energy electrons show a pronounced dependence on the time delay between the near-infrared laser and the x-ray pulse.