Rostock 2019 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 19: Cluster I (joint session A/MO)

A 19.2: Hauptvortrag

Mittwoch, 13. März 2019, 14:30–15:00, S HS 3 Physik

Multi-coincidence experiments on electron and photon emission — •Andre Knie — Institut für Physik und CINSaT, Universität Kassel

The coincident detection of particles is a powerful method in experimental physics, enabling the reconstruction of diverse projectile-target interactions. The overwhelming majority of coincidence experiments is performed detecting exclusively charged particles. When neutrals or photons are of interest, experiments typically suffer from small solid angles. Here, a new approach is shown maximizing the available solid angle for photon detection, confining the interaction volume within focusing optics. With it a series of experiments was performed on atomic and cluster samples to underline its capabilities. With this technique it was possible to disentangle Auger processes in argon otherwise unresolvable by spectroscopic means. Additionally, the coincident detection was used to circumvent the typical signal to noise ratio of an ultra low cross section process, e.g. luminescent shake up satellites in helium. The final example shows that completely new processes can be unraveled with this technique: A new energy transfer process in weakly bound heterogeneous noble gas clusters will be presented.