CFEL-CMI

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2018-02-02
16:01
OpenAccess [PUBDB-2018-01024] Journal Article
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Femtosecond X-ray diffraction from an aerosolized beam of protein nanocrystals
ddc:540
High-resolution Bragg diffraction from aerosolized single granulovirus nano-crystals using an X-ray free-electron laser is demonstrated. The outerdimensions of the in-vacuum aerosol injector components are identical toconventional liquid-microjet nozzles used in serial diffraction experiments,which allows the injector to be utilized with standard mountings. [...]
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2018-01-05
13:44
OpenAccess [PUBDB-2018-00199] Journal Article
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Photodissociation of Aligned $\mathrm{CH_3I}$ and $\mathrm{C_{6}H_{3}F_{2}I}$ Molecules Probed with Time-Resolved Coulomb Explosion Imaging by Site-Selective XUV Ionization
ddc:530
We explore time-resolved Coulomb explosion induced by intense, extreme ultraviolet (XUV) femtosecond pulses from a free-electron laser as a method to image photo-induced molecular dynamics in two molecules, iodomethane and 2,6-difluoroiodobenzene. At an excitation wavelength of 267 nm, the dominant reaction pathway in both molecules is neutral dissociation via cleavage of the carbon–iodine bond. [...]
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2017-12-22
15:55
OpenAccess [PUBDB-2017-14103] Bachelor Thesis
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Preparatory studies on diiodo-molecules for use in gas phase electron diffraction
53 pp. (2017) [10.3204/PUBDB-2017-14103] = Bachelorarbeit, University of Hamburg, 2017  GO
In the framework of this thesis several candidate molecules were tested with regard to their feasibility for benchmark electron diffraction experiments on controlled gaseous samples. Electron diffraction serves as a tool for structure determination of molecules in the gas phase without the need for crystalline samples. [...]
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2017-11-13
18:29
[PUBDB-2017-11924] Poster
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Ultrafast fragmentation dynamics of Phenanthrene andPyrene after photoionization at 30.3 nm wavelength
DESY Users Meeting 2017, Meeting locationHamburg, Germany, 25 Jan 2017 - 27 Jan 20172017-01-252017-01-27

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2017-11-13
18:15
[PUBDB-2017-11921] Conference Presentation
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Probing Ultrafast Nuclear Dynamics in Halomethanes by Time-Resolved Electron and Ion Imaging
APS Division of Atomic and Molecular Physics Meeting 2016, Meeting locationProvidence, USA, 23 Mar 2016 - 27 Mar 20162016-03-232016-03-27

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2017-11-09
10:46
OpenAccess [PUBDB-2017-11808] Journal Article
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Coulomb-explosion imaging of concurrent $\mathrm{CH_2BrI}$ photodissociation dynamics
ddc:530
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. [...]
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2017-09-14
15:55
[PUBDB-2017-10782] Journal Article
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Time-Resolved Measurement of Interatomic Coulombic Decay Induced by Two-Photon Double Excitation of Ne 2
ddc:550
The hitherto unexplored two-photon doubly excited states [Ne*$(2p−^13s)]_2$ were experimentallyidentified using the seeded, fully coherent, intense extreme ultraviolet free-electron laser FERMI. Thesestates undergo ultrafast interatomic Coulombic decay (ICD), which predominantly produces singly ionizeddimers. [...]
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2017-09-14
15:52
[PUBDB-2017-10781] Journal Article
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Slow Interatomic Coulombic Decay of Multiply Excited Neon Clusters
ddc:550
Ne clusters (∼5000 atoms) were resonantly excited $(2p→3s)$ by intense free electron laser (FEL)radiation at FERMI. Such multiply excited clusters can decay nonradiatively via energy exchange betweenat least two neighboring excited atoms. [...]
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2017-09-14
10:07
OpenAccess [PUBDB-2017-10745] Journal Article
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Mix-and-diffuse serial synchrotron crystallography
IUCrJ 4(6), 769 - 777 (2017) [10.1107/S2052252517013124]  GO
ddc:530
Unravelling the interaction of biological macromolecules with ligands and substrates at high spatial and temporal resolution remains a major challenge in structural biology. The development of serial crystallography methods at X-ray free-electron lasers and subsequently at synchrotron light sources allows new approaches to tackle this challenge. [...]
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2017-09-07
07:54
[PUBDB-2017-10449] Journal Article
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Attosecond chronoscopy of electron scattering in dielectric nanoparticles
Nature physics 13(8), 766 - 770 (2017) [10.1038/nphys4129]  GO
ddc:530
The scattering of electrons in dielectric materials is central to laser nanomachining$^1$, light-driven electronics$^2$ and radiation damage$^{3, 4, 5}$. Here, we demonstrate real-time access to electron scattering by implementing attosecond streaking spectroscopy on dielectric nanoparticles: photoelectrons are generated inside the nanoparticles and both their transport through the material and photoemission are tracked on an attosecond timescale [...]
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