FS-CFEL-3

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2017-12-08
09:14
[PUBDB-2017-12959] Journal Article
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The fractal geometry of Hartree-Fock
Chaos 27(12), 123103 - (2017) [10.1063/1.5001681]  GO
ddc:530
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2017-12-06
10:32
[PUBDB-2017-12783] Journal Article
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Contrasting behavior of covalent and molecular carbon allotropes exposed to extreme ultraviolet and soft x-ray free-electron laser radiation
ddc:530
All carbon materials, e.g., amorphous carbon (a-C) coatings and $C_{60}$ fullerene thin films, play an important role in short-wavelength free-electron laser (FEL) research motivated by FEL optics development and prospective nanotechnology applications. Responses of a-C and $C_{60}$ layers to the extreme ultraviolet (SPring-8 Compact SASESource in Japan) and soft x-ray (free-electron laser in Hamburg) free-electron laser radiation are investigated by Raman spectroscopy, differential interference contrast, and atomic force microscopy. [...]
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2017-11-16
11:35
OpenAccess [PUBDB-2017-12040] Journal Article
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Time-resolved ultrafast x-ray scattering from an incoherent electronic mixture
ddc:530
Time-resolved ultrafast x-ray scattering from photoexcited matter is an emerging method to image ultrafast dynamics in matter with atomic-scale spatial and temporal resolutions. For a correct and rigorous understanding of current and upcoming imaging experiments, we present the theory of time-resolved x-ray scattering from an incoherent electronic mixture using quantum electrodynamical theory of light-matter interaction [...]
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2017-11-03
12:05
Embargoed OpenAccess [PUBDB-2017-11678] Journal Article
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Ab Initio Investigation of Nonlinear Mode Coupling in C$_{60}$
ddc:530
Strong light fields may be used to control molecular structure, thus providing a route to new, light-induced phases of matter. In this context, we present an ab initio molecular dynamics investigation of nonlinear mode coupling in C$_{60}$ and show that, under suitable conditions, resonant infrared excitation induces significant structural changes in the system. [...]
Published on 2017-10-30. Available in OpenAccess from 2018-10-30.: Supp_info - Download fulltextPDF Download fulltextPDF (PDFA); nonlin_mode_coup - Download fulltextPDF Download fulltextPDF (PDFA); Restricted: Download fulltextPDF Download fulltextPDF (PDFA);

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2017-09-22
11:13
[PUBDB-2017-10986] Journal Article
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2D THz-THz-Raman Photon-Echo Spectroscopy of Molecular Vibrations in Liquid Bromoform
ddc:530
Fundamental properties of molecular liquids are governed by long-range interactions that most prominently manifest at terahertz (THz) frequencies. Here we report the detection of nonlinear THz photon-echo (rephasing) signals in liquid bromoform using THz-THz-Raman spectroscopy. [...]
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2017-09-19
13:46
[PUBDB-2017-10894] Journal Article
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Picosecond relaxation of X-ray excited GaAs
ddc:530
In this paper we present the current status of our theoretical studies on ultrafast relaxation of X-ray/XUV excited gallium arsenide. First, we discuss our previous approach, the unified model based on rate equations, two-temperature model and the extended Drude approach. [...]
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2017-09-13
09:50
[PUBDB-2017-10687] Journal Article
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Simulations of ultrafast x–ray laser experiments
SPIE Optics + Optoelectronics, Meeting locationPrague, Czech Republic, Proceedings of SPIE 10237, 102370S (2017) [10.1117/12.2270552]  GO
ddc:620
Simulations of experiments at modern light sources, such as optical laser laboratories, synchrotrons, and free electron lasers, become increasingly important for the successful preparation, execution, and analysis of these experiments investigating ever more complex physical systems, e.g. biomolecules, complex materials, and ultra–short lived states of matter at extreme conditions. [...]
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2017-09-07
12:59
OpenAccess [PUBDB-2017-10472] Journal Article
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Ultrafast isomerization in acetylene dication after carbon K-shell ionization
ddc:500
Ultrafast proton migration and isomerization are key processes for acetylene and its ions. However, the mechanism for ultrafast isomerization of acetylene [HCCH]$^{2+}$to vinylidene [H$_2$CC]$^{2+}$ dication remains nebulous [...]
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2017-09-05
12:28
OpenAccess [PUBDB-2017-10340] Journal Article
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Start-to-end simulation of single-particle imaging using ultra-short pulses at the European X-ray Free-Electron Laser
IUCrJ 4(5), 560 - 568 (2017) [10.1107/S2052252517009496]  GO
ddc:530
Single-particle imaging with X-ray free-electron lasers (XFELs) has the potential to provide structural information at atomic resolution for non-crystalline biomolecules. This potential exists because ultra-short intense pulses can produce interpretable diffraction data notwithstanding radiation damage [...]
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2017-09-04
11:09
[PUBDB-2017-10290] Journal Article
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Simulations of single-particle imaging of hydrated proteins with x-ray free-electron lasers
Advances in Computational Methods for X-Ray Optics IV, Meeting locationSan Diego, United States, 6 Aug 2017 - 10 Aug 20172017-08-062017-08-10 Proceedings of SPIE 10388, 10388OM (2017) [10.1117/12.2275274]  GO
ddc:620
We employ start–to-end simulations to model coherent diffractive imaging of single biomolecules usingx-ray free electron lasers. This technique is expected to yield new structural information about biologically relevantmacromolecules thanks to the ability to study the isolated sample in its natural environment as opposed to crystallizedor cryogenic samples. [...]
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