Gregor Schiwietz

Areas of Research

Synchrotron-Radiation Experiments

• Development of electron time-of-flight (TOF) techniques for application with pulsed photon sources
• Auger- and photo-electron spectroscopy as well as electron-electron coincidences

Experiments on Ion-Solid Interactions (Particle Emission)

• High resolution  Auger-, convoy- and delta-electron spectroscopy (with fast highly-charged ions) - First determinations of the nuclear-track potential and of the electron temperature inside ion tracks 
• Projectile energy-loss (with fast highly-charged ions)
• Desorption and light emission from surface atoms
  (with slow highly-charged projectile ions, ECR-source and EBIT)
• Conductivity changes (with fast highly-charged ions)
• Electron-electron coincidences

Theory of Ion-Solid Interactions (Energy Loss and Electron Transport)

• Highly precise quantum mechanical projectile energy-loss model
  (coupled-channel treatment of localized orbitals, AO)
• Classical projectile energy-loss model
  (classical-trajectory Monte-Carlo model for localized orbitals, CTMC)
• First quantum mechanical projectile energy-loss model for intra-band transitions (perturbation theory for s-states and channeling, B1)
• Classical models for electron transport and ion-track potentials

Auxiliary Experiments: Ion-Atom Collision-Processes

• Auger- and delta-electron emission in
  coincidence with scattered projectiles and charged target atoms
• Electron capture

Auxiliary Theory: Ion-Atom Collision-Processes

• Quantum mechanical and classical models for excitation, ionization and energy loss (B1, AO, CTMC)

Go Solar

Project Management: Experiment and Theory

Valence wavefunctions, atomic potential and transitions for a spherical solid-state model of carbon (graphite).