CHEM Talks with Lars Hemmingsen
Title: Molecular structure and dynamics probed by PAC spectroscopy
Abstract:
The decay of a radioactive nucleus can be influenced by its surroundings through hyperfine interactions. Thus, recording the fine details of nuclear decay — specifically, the perturbed angular correlation (PAC) of γ-rays emitted in a γ-γ cascade — it is possible to obtain a signature of the local molecular structure, dynamics, and magnetic field at the probe site.
I will present selected applications of PAC spectroscopy in chemistry/biochemistry, elucidating local structure and nanosecond dynamics at a protein metal ion binding site, Brownian molecular tumbling (rotational diffusion), nanoscale phase transitions, and in vivo lifetimes of liposomes relevant to drug delivery.
Speaker
Associate Professor Lars Hemmingsen
Date
Friday 19/9-2025 at 12:15