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2020-01-15
15:33
[PUBDB-2020-00323] Journal Article
et al
Fission of charged nano-hydrated ammonia clusters – microscopic insights into the nucleation processes
While largely studied on the macroscopic scale, the dynamics leading to nucleation and fission processes in atmospheric aerosols are still poorly understood at the molecular level. Here, we present a joint experimental–theoretical study of a model system consisting of hydrogen-bonded ammonia and water molecules. [...]
ddc:540
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2020-01-14
15:18
[PUBDB-2020-00240] Journal Article
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Asynchronous Photoexcited Electronic and Structural Relaxation in Lead-Free Perovskites
Vacancy-ordered lead-free perovskites with more-stable crystallinestructures have been intensively explored as the alternatives for resolving the toxicand long-term stability issues of lead halide perovskites (LHPs). The dispersiveenergy bands produced by the closely packed halide octahedral sublattice in theseperovskites are meanwhile anticipated to facility the mobility of charge carriers.However, these perovskites suffer from unexpectedly poor charge carrier transport.To tackle this issue, we have employed the ultrafast, elemental-specific X-raytransient absorption (XTA) spectroscopy to directly probe the photoexcitedelectronic and structural dynamics of a prototypical vacancy-ordered lead-freeperovskite (Cs3Bi2Br9). [...]
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2020-01-13
14:59
[PUBDB-2020-00145] Journal Article
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Symphony on strong field approximation
This paper has been prepared by the Symphony collaboration (University of Warsaw, Uniwersytet Jagielloński, DESY/CNR and ICFO) on the occasion of the 25th anniversary of the 'simple man's models' which underlie most of the phenomena that occur when intense ultrashort laser pulses interact with matter. The phenomena in question include high-harmonic generation (HHG), above-threshold ionization (ATI), and non-sequential multielectron ionization (NSMI). [...]
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ddc:530
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2019-12-02
14:13
[PUBDB-2019-04660] Conference Presentation (Invited)

Probing electronic processes in large molecules
28th International Symposium on Molecular Beams, ISMB, Heriot-Watt UniversityEdinburgh, Heriot-Watt University, United Kingdom, 23 Jun 2019 - 27 Jun 20192019-06-232019-06-27
Attosecond science is nowadays a well-established research field, which offers formidable tools for the realtime investigation of electronic processes [1]. In this context, we have recently demonstrated that attosecond pulses can initiate charge migration in aromatic amino-acids [2]. [...]
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2019-11-29
19:34
OpenAccess [PUBDB-2019-04611] Journal Article/Contribution to a conference proceedings
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High-resolution mass spectrometry and velocity map imaging for ultrafast electron dynamics in complex biomolecules
XXI International Conference on Ultrafast Phenomena 2018 (UP 2018), UP2018, HamburgHamburg, Germany, 15 Jul 2018 - 20 Jul 20182018-07-152018-07-20 The European physical journal / Web of Conferences 205, 3007 () [10.1051/epjconf/201920503007]  GO
We present a design combining a velocity map imaging electron spectrometer with a reflectron mass spectrometer. Since the two spectrometer sides have different intrinsic requirements for the electric field in the central region, a large number of electrodes and a reflectron-geometry of the mass spectrometer were employed to achieve simultaneous high resolutions. [...]
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ddc:530
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2019-06-25
10:27
Embargoed OpenAccess [PUBDB-2019-02576] Journal Article
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Atomic-resolution imaging of carbonyl sulfide by laser-induced electron diffraction
Measurements on the strong-field ionization of carbonyl sulfide molecules by short, intense, 2 µm wavelength laser pulses are presented from experiments where angle-resolved photoelectron distributions were recorded with a high-energy velocity map imaging spectrometer, designed to reach a maximum kinetic energy of 500 eV. The laser-field-free elastic-scattering cross section of carbonyl sulfide was extracted from the measurements and is found in good agreement with previous experiments, performed using conventional electron diffraction. [...]
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2019-05-16
12:47
OpenAccess [PUBDB-2019-02297] Journal Article/Contribution to a conference proceedings
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Strong-field physics in the molecular frame
XXI International Conference on Ultrafast Phenomena 2018, UP 2018, HamburgHamburg, Germany, 15 Jul 2018 - 20 Jul 20182018-07-152018-07-20 The European physical journal / Web of Conferences 205, 07002 () [10.1051/epjconf/201920507002]  GO
Laser-aligned carbonyl-sulfide molecules were strong-field ionized using mid-infrared light. Investigating the strong-field effects in the molecular frame allowed to add novel facets to the understanding of the intrinsic nature of strong-field physics..
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2019-05-16
09:36
OpenAccess [PUBDB-2019-02294] Journal Article/Contribution to a conference proceedings
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Generation and complete temporal characterization of 5-fs EUV pulses
XXI International Conference on Ultrafast Phenomena 2018, UP 2018, HamburgHamburg, Germany, 15 Jul 2018 - 20 Jul 20182018-07-152018-07-20 The European physical journal / Web of Conferences 205, 02009 () [10.1051/epjconf/201920502009]  GO
Extreme-ultraviolet pulses as short as 5 fs, produced by high- order harmonic generation and selected by a time-delay compensated monochromator, were fully reconstructed thanks to an advanced ptychographic technique, while most commonly used reconstruction methods fail. These pulses constitute the shortest extreme ultraviolet pulses ever achieved via a time-delay compensated monochromator..
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2019-05-14
14:52
[PUBDB-2019-02274] Lecture
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Molecular and Ultrafast Science Seminar (MUSS)
Lecture at Universität Hamburg (Hamburg, Germany), 1 Apr 2019 - 13 Jul 20192019-04-012019-07-13
CFEL Molecular and Ultrafast Science Seminar (MUSS) series. This is a general topical seminar series on developments in modern molecular and ultrafast science jointly organized by the CFEL Controlled Molecule Imaging group, the Spectroscopy of molecular processes group, the CFEL Attosecond Science group, and the CFEL Ultrafast Optics group. [...]
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2019-05-14
14:03
[PUBDB-2019-02269] Lecture
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CFEL Molecular and Ultrafast Science Seminar (MUSS)
Lecture at Universität Hamburg (), 15 Oct 2018 - 2 Feb 20192018-10-152019-02-02
CFEL Molecular and Ultrafast Science Seminar (MUSS) series. This is a general topical seminar series on developments in modern molecular physics organized by the CFEL Controlled Molecule Imaging group, the Spectroscopy of molecular processes group, the CFEL Attosecond Science group, and the CFEL Ultrafast Optics group. [...]
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