# FS-FLASH-D

 2017-11-1010:23 [PUBDB-2017-11856] Bachelor Thesis Schunck, J. Röntgenabsorptionsspektroskopie an chemisch und thermisch behandelten Kupfer-Beryllium Legierungen 59 pp. (2017) = Bachelorarbeit, University of Hamburg, 2017 Due to their high secondary electron yield, copper-beryllium alloys with a beryllium molefraction of approximately 14 % (Cu 0.86 Be 0.14 ) are commercially available materials fordynodes of charged particle detectors. By using multiple layers of dynodes, even singleparticles can be detected. [...] 2017-11-0910:46 [PUBDB-2017-11808] Journal Article et al Coulomb-explosion imaging of concurrent CH$_{2}$BrI photodissociation dynamics Physical review / A 96(4), 043415 (2017) [10.1103/PhysRevA.96.043415]   The dynamics following laser-induced molecular photodissociation of gas-phase CH$_{2}$BrI at 271.6 nm were investigated by time-resolved Coulomb-explosion imaging using intense near-IR femtosecond laser pulses. The observed delay-dependent photofragment momenta reveal that CH$_{2}$BrI undergoes C-I cleavage, depositing 65.6% of the available energy into internal product states, and that absorption of a second UV photon breaks the C-Br bond ofCH$_{2}$Br. [...] OpenAccess: PDF PDF (PDFA); External link: Fulltext 2017-11-0818:42 [PUBDB-2017-11787] Journal Article et al The FLASH Facility: Advanced Options for FLASH2 and Future Perspectives Applied Sciences 7(11), 1114 (2017) [10.3390/app7111114]   Since 2016, the two free-electron laser (FEL) lines FLASH1 and FLASH2 have been run simultaneously for users at DESY in Hamburg. With the installation of variable gap undulators in the new FLASH2 FEL line, many new possibilities have opened up in terms of photon parameters for experiments. [...] OpenAccess: PDF PDF (PDFA); 2017-08-1916:18 [PUBDB-2017-09552] Journal Article/Contribution to a conference proceedings et al Photoionization and photofragmentation of ${{\rm{Lu}}}_{3}{{\rm{N@C}}}_{80}^{{\rm{q}}+}$ ions (q = 1,2,3) XXX International Conference on Photonic, Electronic, and Atomic Collisions, Meeting locationCairns, Australia, 25 Jul 2017 - 1 Aug 2017   Cross sections for photoionization and photofragmentation of singly, doubly and triply charged Lu3N@C80 ions have been measured using the photon-ion merged-beams technique at the PETRA III synchrotron light source. The measured spectra exhibit prominent resonance features at energies around the carbon K edge. [...] OpenAccess: 2017-ICPEAC-PIPE-Lu3N@C80 - PDF PDF (PDFA); Hellhund_2017_J._Phys.__Conf._Ser._875_032034 - PDF PDF (PDFA); 2017-08-1916:12 [PUBDB-2017-09551] Journal Article/Contribution to a conference proceedings et al Photoionization and photofragmentation of ${{\rm{Sc}}}_{3}{{\rm{N@C}}}_{80}^{+}$ at energies from the carbon K edge to the scandium L and nitrogen K edges XXX International Conference on Photonic, Electronic, and Atomic Collisions, Meeting locationCairns, Australia, 25 Jul 2017 - 1 Aug 2017   Photoionization of endohedral ${{\rm{Sc}}}_{3}{{\rm{N@C}}}_{80}^{+}$ fullerene ions is investigated using synchrotron radiation in the energy range 280 to 420 eV. In the product channels ${{\rm{Sc}}}_{3}{{\rm{N@C}}}_{80}^{2+}$ and ${{\rm{Sc}}}_{3}{{\rm{N@C}}}_{78}^{2+}$ clear signaiures of the cross section contributions arising from L-shell photoabsorption by the encapsulated Sc atoms have been detected [...] OpenAccess: PDF PDF (PDFA); 2017-08-1916:06 [PUBDB-2017-09550] Journal Article/Contribution to a conference proceedings et al Photoionization of Ne$^{+}$ ions and Ne atoms near the K edge XXX International Conference on Photonic, Electronic, and Atomic Collisions, Meeting locationCairns, Australia, 26 Jul 2017 - 1 Aug 2017   Absolute cross sections for photoprocesses near the K edge of Ne$^{+}$ ions and neutral Ne atoms have been determined at resolving powers up to 27000 facilitating the precise determination of natural widths of the most prominent resonances as well as the associated transition probabilities and branching ratios. OpenAccess: PDF PDF (PDFA); External link: Fulltext 2017-08-0915:15 [PUBDB-2017-09033] Journal Article et al Single-shot Monitoring of Ultrafast Processes via X-ray Streaking at a Free Electron Laser Scientific reports 7(1), 7253 (2017) [10.1038/s41598-017-07069-z]   The advent of x-ray free electron lasers has extended the unique capabilities of resonant x-ray spectroscopy techniques to ultrafast time scales. Here, we report on a novel experimental method that allows retrieving with a single x-ray pulse the time evolution of an ultrafast process, not only at a few discrete time delays, but continuously over an extended time window [...] OpenAccess: PDF PDF (PDFA); 2017-07-1316:21 [PUBDB-2017-07579] Preprint/Report et al Alignment, Orientation, and Coulomb Explosion of Difluoroiodobenzene Studied with the Pixel Imaging Mass Spectrometry (PImMS) Camera [arXiv:1706.08376] Laser-induced adiabatic alignment and mixed-field orientation of 2,6-difluoroiodobenzene (C$_6$H$_3$F$_2$I) molecules are probed by Coulomb explosion imaging following either near-infrared strong-field ionization or extreme-ultraviolet multi-photon inner-shell ionization using free-electron laser pulses. The resulting photoelectrons and fragment ions are captured by a double-sided velocity map imaging spectrometer and projected onto two position-sensitive detectors. [...] Fulltext: JPEG; OpenAccess: PDF PDF (PDFA); 2017-06-0817:06 [PUBDB-2017-04558] Journal Article et al Communication: Direct evidence for sequential dissociation of gas-phase Fe(CO)$_5$ via a singlet pathway upon excitation at 266 nm The journal of chemical physics 146(21), 211103 (2017) [10.1063/1.4984774]   We prove the hitherto hypothesized sequential dissociation of Fe(CO)$_5$ in the gas phase upon photoexcitation at 266 nm via a singlet pathway with time-resolved valence and core-level photoelectron spectroscopy with an x-ray free-electron laser. Valence photoelectron spectra are used to identify free CO molecules and to determine the time constants of stepwise dissociation to Fe(CO)$_4$ within the temporal resolution of the experiment and further to Fe(CO)$_3$ within 3 ps [...] OpenAccess: PDF PDF (PDFA); 2017-05-1010:10 [PUBDB-2017-02555] Report/Journal Article et al Alignment, orientation, and Coulomb explosion of difluoroiodobenzene studied with the pixel imaging mass spectrometry (PImMS) camera [arXiv:1706.08376] The journal of chemical physics 147(1), 013933 (2017) [10.1063/1.4982220]   Laser-induced adiabatic alignment and mixed-field orientation of 2,6-difluoroiodobenzene (C$_6$H$_3$F$_2$I) molecules are probed by Coulomb explosion imaging following either near-infrared strong-field ionization or extreme-ultraviolet multi-photon inner-shell ionization using free-electron laser pulses. The resulting photoelectrons and fragment ions are captured by a double-sided velocity map imaging spectrometer and projected onto two position-sensitive detectors. [...] Fulltext: GIF; OpenAccess: PDF;