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

D. Rolles, R. Boll, M. Adolph, A. Aquila, C. Bostedt, J. D. Bozek, H. N. Chapman, R. Coffee, N. Coppola, P. Decleva, T. Delmas, S. W. Epp, B. Erk, F. Filsinger, L. Foucar, L. Gumprecht, A. Hömke, T. Gorkhover, L. Holmegaard, P. JohnssonCh Kaiser, F. Krasniqi, K. U. Kühnel, J. Maurer, M. Messerschmidt, R. Moshammer, W. Quevedo, I. Rajkovic, A. Rouzée, B. Rudek, I. Schlichting, C. Schmidt, S. Schorb, C. D. Schröter, J. Schulz, H. Stapelfeldt, M. Stener, S. Stern, S. Techert, J. Thøgersen, M. J.J. Vrakking, A. Rudenko, J. Küpper, J. Ullrich

Research output: Contribution to journalArticlepeer-review

45 Scopus citations


We present time-resolved femtosecond photoelectron momentum images and angular distributions of dissociating, laser-aligned 1,4-dibromobenzene (C 6H4Br2) 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.

Original languageEnglish (US)
Article number124035
JournalJournal of Physics B: Atomic, Molecular and Optical Physics
Issue number12
StatePublished - Jun 28 2014
Externally publishedYes


  • femtosecond pump-probe
  • free-electron laser
  • laser alignment
  • molecular-frame photoelectron angular distributions
  • photoelectron diffraction

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics


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