Rate My Professor Raimund Feifel

Raimund Feifel is Professor of Atomic and Molecular Physics in the Department of Physics at the University of Gothenburg, leading the Low Density Matter – Structure and Dynamics research group. Prior to this, he held a full professorship at Uppsala University. His research focuses on photon science in atomic and molecular physics, utilizing multi-particle coincidence techniques for photoelectron and photoion spectroscopy. Key areas include the study of multiply ionized reactive intermediates, their spectra and decay dynamics using vacuum ultraviolet and X-radiation; XUV and X-ray ultrafast spectroscopy of molecular and cluster photo-dynamics; multiple detachment processes in negative ions; and attosecond chronoscopy of electron emission from wave-packets in negative ions and neutrals. These investigations address processes in interstellar media, planetary atmospheres, plasmas, and chemical reactions.

Feifel's group has commissioned advanced instrumentation, including an XUV-IR interferometer for pump-probe measurements demonstrating sideband generation and above-threshold ionization in xenon, and is constructing Gothenburg’s first attosecond science facility, Attohallen, based on a femtosecond OPCPA laser system. They have collaborated on ultra-stable attosecond interferometry with 13 as RMS stability and observed symmetry breaking in core-valence double ionization of allene. Research is funded by the Swedish Research Council for projects on reactive intermediates and ultrafast spectroscopy, Knut and Alice Wallenberg Foundation—including 34 million SEK for Attosecond Pulse Induced Quantum Electronic Processes and network grants for excellence clusters—and Olle Engkvist Byggmästare Foundation for negative ion studies. Notable publications co-authored by Feifel include "Photoionization in the time and frequency domain" (Science, 2017), "Attosecond pulse shaping using a seeded free-electron laser" (Nature, 2020), "Observation of Rabi dynamics with a short-wavelength free-electron laser" (Nature, 2022), and "Measuring the quantum state of photoelectrons" (Nature Photonics, 2025). His contributions extend to experiments at facilities like FERMI, BESSY-II, and Lund Laser Center, advancing understanding of ultrafast electronic processes.