Gregor Hartmann
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Explore the profile of Gregor Hartmann including associated specialties, affiliations and a list of published articles.
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16
Citations
50
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Recent Articles
1.
Bloss D, Kryzhevoi N, Maurmann J, Schmidt P, Knie A, Viehmann J, et al.
Phys Chem Chem Phys
. 2025 Mar;
PMID: 40047179
Soft X-ray irradiation of molecules causes electronic core-level vacancies through photoelectron emission. In light elements, such as C, N, or O, which are abundant in the biosphere, these vacancies predominantly...
2.
Feuer-Forson P, Hartmann G, Mitzner R, Baumgartel P, Weniger C, Agaker M, et al.
J Synchrotron Radiat
. 2024 Jun;
31(Pt 4):698-705.
PMID: 38900459
During beam time at a research facility, alignment and optimization of instrumentation, such as spectrometers, is a time-intensive task and often needs to be performed multiple times throughout the operation...
3.
Ilchen M, Schmidt P, Novikovskiy N, Hartmann G, Rupprecht P, Coffee R, et al.
Commun Chem
. 2023 Jan;
4(1):119.
PMID: 36697819
Short-wavelength free-electron lasers with their ultrashort pulses at high intensities have originated new approaches for tracking molecular dynamics from the vista of specific sites. X-ray pump X-ray probe schemes even...
4.
Hartmann G, Goetzke G, Dusterer S, Feuer-Forson P, Lever F, Meier D, et al.
Sci Rep
. 2022 Dec;
12(1):20783.
PMID: 36456706
We present real-world data processing on measured electron time-of-flight data via neural networks. Specifically, the use of disentangled variational autoencoders on data from a diagnostic instrument for online wavelength monitoring...
5.
Dingel K, Otto T, Marder L, Funke L, Held A, Savio S, et al.
Sci Rep
. 2022 Oct;
12(1):17809.
PMID: 36280680
X-ray free-electron lasers (XFELs) as the world's brightest light sources provide ultrashort X-ray pulses with a duration typically in the order of femtoseconds. Recently, they have approached and entered the...
6.
Schwickert D, Ruberti M, Kolorenc P, Usenko S, Przystawik A, Baev K, et al.
Sci Adv
. 2022 Jun;
8(22):eabn6848.
PMID: 35648864
Here, we use x-rays to create and probe quantum coherence in the photoionized amino acid glycine. The outgoing photoelectron leaves behind the cation in a coherent superposition of quantum mechanical...
7.
De Fanis A, Ilchen M, Achner A, Baumann T, Boll R, Buck J, et al.
J Synchrotron Radiat
. 2022 May;
29(Pt 3):755-764.
PMID: 35511008
A set of electron time-of-flight spectrometers for high-resolution angle-resolved spectroscopy was developed for the Small Quantum Systems (SQS) instrument at the SASE3 soft X-ray branch of the European XFEL. The...
8.
Li S, Driver T, Rosenberger P, Champenois E, Duris J, Al-Haddad A, et al.
Science
. 2022 Jan;
375(6578):285-290.
PMID: 34990213
In quantum systems, coherent superpositions of electronic states evolve on ultrafast time scales (few femtoseconds to attoseconds; 1 attosecond = 0.001 femtoseconds = 10 seconds), leading to a time-dependent charge...
9.
Hans A, Schmidt P, Kustner-Wetekam C, Trinter F, Deinert S, Bloss D, et al.
J Phys Chem Lett
. 2021 Jul;
12(30):7146-7150.
PMID: 34297572
The predominant reason for the damaging power of high-energy radiation is multiple ionization of a molecule, either direct or via the decay of highly excited intermediates, as, e.g., in the...
10.
Hans A, Miteva T, Holzapfel X, Ozga C, Schmidt P, Otto H, et al.
Phys Rev Lett
. 2019 Dec;
123(21):213001.
PMID: 31809166
We report the observation of the radiative decay of singly charged noble gas ground-state ions embedded in heterogeneous van der Waals clusters. Electron-photon coincidence spectroscopy and dispersed photon spectroscopy are...