Journal
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
Volume 47, Issue 12, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0953-4075/47/12/124035
Keywords
free-electron laser; photoelectron diffraction; molecular-frame photoelectron angular distributions; laser alignment; femtosecond pump-probe
Categories
Funding
- Max Planck Society
- CAMP instrument
- Helmholtz Gemeinschaft through the Young Investigator Program
- Carlsberg Foundation
- excellence cluster 'The Hamburg Centre for Ultrafast Imaging-Structure, Dynamics and Control of Matter at the Atomic Scale' of the Deutsche Forschungsgemeinschaft
- Stichting voor Fundamenteel Onderzoek der Materie
- Nederlandse organisatie voor Wetenschappelijk Onderzoek
- Swedish Research Council
- Swedish Foundation for Strategic Research
- Office of Basic Energy Sciences
- US Department of Energy
- Nanoscale photonic imaging [SFB 755]
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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.
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