DESIREE&Friends 9 --- Photoelectron Imaging of Bound, Weakly Bound, and Metastable Anions

by Prof. Andrei Sanov (University of Arizona)

Thursday 16 Apr 2026, 13:00 → 13:45 Europe/Stockholm

FB42 (AlbaNova Main Building)

Photoelectron imaging is a powerful spectroscopic tool for probing the electronic structure and dynamics of atomic, molecular, and cluster anions. In addition to the energy spectra that report electron energies and vibrational structure, the photoelectron angular distributions (PADs) encode rich information reflecting interference between different partial waves of the emitted electron and therefore the characters of the open photodetachment channels. I will discuss PADs observed in the photodetachment of various atomic, molecular, and cluster anions, emphasizing the distinctions between strongly bound valence anions, weakly bound valence and non-valence (dipole- and correlation-bound) states, and transient metastable valence anions (resonances). Several qualitative and physically intuitive quantitative models will be presented to interpret the observed PADs as signatures of the parent orbitals. These insights empower conceptual interpretation and complement high-resolution studies of ions in their ground or metastable states in cryogenic storage rings such as DESIREE.