Experimentalphysik IV


Beamtime at PETRA III in Hamburg

From 22. - 29.04.2024, Emilia Heikura, Andreas Hans, Johannes Viehmann, Leon Schwarz and Madhusree Roy-Chowdhury were experimenting at the P04 beamline of the PETRA III storage ring in Hamburg. They were studying photoelectron circular dichroism (PECD) on electrons with high kinetic energy after participator Auger decay in the chiral molecule methyloxirane.

New bachelor students

Welcome Joel Herrmann and Leon Schwarz. We wish you a good time in the AG Ehresmann!

Beamtime at MAX IV in Sweden


From 31.03. - 09.04.2024, Madhusree Roy-Chowdhury, Andreas Hans, Christina Zindel, Emilia Heikura, Johannes Viehmann and Niklas Golchert experimented at the FinEstBeAMS beamline of the MAX IV storage ring in Sweden. They investigated the fragmentation pattern of pyrmidine-water clusters after inner-shell ionization of the water and pyrimidine molecules using the PePiPiCo (Photoelectron-Photoion-Photoion-Coincidence) method. The results are expected to give additional insights in the protective or destructive effects of watery environments to X-ray irradiated biomolecules.

DPG spring meeting 2024 (SKM)

Group picture.

From 17. -22.03.2024, Bhavadip Rakholiya, Christian Janzen, Jonas Bugase, Nikolai Weidt, Rico Huhnstock and Yahya Shubbak participated in the Spring meeting of the German Physical Society (DPG) for the Section condensed matter (SKM) in Berlin. They contributed 3 talks, 3 posters and 1 science slam to the scientific programme of the conference.

DPG Spring meeting 2024 (SAMOP)

Group picture.

From 10. - 15.03.2024, Adrian Krone, Andreas Hans, Arno Ehresmann, Catmarna Küstner-Wetekam, Christina Zindel, Dana Bloß, Emilia Heikura, Johannes Viehmann, Lutz Marder, Madhusree Roy-Chowdhury, Niklas Golchert and Yusaku Terao participated in  the Spring meeting of the German Physical Society DPG for the Section Atoms, Molecules, Quantum Optics and Photonics (SAMOP) in Freiburg. They contributed 10 talks and 1 poster to the scientific programme of the conference.

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Current research highlights

Combined Funnel, Concentrator, and Particle Valve Functional Element for Magnetophoretic Bead Transport Based on Engineered Magnetic Domain Patterns


Information about possible topics for your bachelor's / master's thesis, your state examination or your PhD in the group of A. Ehresmann and experience reports from graduates can be found here.

Theses: Further Information


Andrea Wecker

Heinr.-Plett-Straße 40
34132 Kassel
Room 1265

Telefone: +49 561 804-4061
Telefax: +49 561 804-4150

Mo.-Fr. 8:30-16:30

Experimental quantification of site-specific efficiency of Interatomic Coulombic Decay after inner shell ionization

C. Küstner-Wetekam et al.,
Communications physics 6 50 (2023)
DOI: 10.1038/s42005-023-01166-4

Interrelation between polycrystalline structure and time-dependent magnetic anisotropies in exchange-biased bilayers

M. Merkel et al., PRB 102, 144421 (2020)
DOI: 10.1103/PhysRevB.102.144421

Older research highlights

You can find older research highlights here.

Older research highlights: Forward