Synchrotron Radiation Interaction with Matter; Different Techniques. Anders Nilsson. Stanford Synchrotron Radiation Laboratory. Why X-rays? VUV ?. What can we hope to learn?. Photon Interaction. Incident photon interacts with electrons Core and Valence. Cross Sections. Photon isBy toya
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Photoelectron Spectroscopy. Lecture 2: Ionization Transitions Transition moment integral Ionization selection rules and probability Atomic and molecular term symbols A bit of molecular orbital theory. Ionization is still a transition between states. Initial State: Neutral (or anion)
Photoelectron Spectroscopy. Lecture 5 – instrumental details General spectrometer design Vacuum generation and measurement. Electron Amplifier, Counter, and Recorder. Photon Source. Electron Detector. Electron Kinetic Energy Analyzer. Sample. Vacuum Pumps.
Photoelectron Spectroscopy. Lecture 11: Comparison of electronic structure calculations to experiment. Why Calculations?. Can be used to predict chemical/physical behavior, including ionization energies. Can help in assignment of experimental results, particular from spectroscopy.
Photoelectron Spectroscopy. Lecture 4: Deconvolution of complex ionization structure Band shapes with non-resolved vibrational structure Other complications Deriving chemical meaningful information. H 2 +. 18. 17. 16. vertical. adiabatic. 15. Ionization Energy (eV). H 2. 0. 1. 0.
Photoelectron Spectroscopy. Lecture 7 – instrumental details Photon sources Experimental resolution and sensitivity Electron kinetic energy and resolution Electron kinetic energy analyzers. He I h = 23.1eV. HV. He I h = 21.2 eV. Laboratory Photon Sources.
Photoelectron Spectroscopy. Lecture 8 – probability of photoionization Cross-sections Gelius model Asymmetry parameters. Ionization is still a transition between states. Initial State: Neutral (or anion)
Photoelectron Spectroscopy. Lecture 1: Development of Photoelectron Spectroscopy Photoionization “Koopmans’ Theorem” Brief Historical Overview Current Topics. e-. e-. e-. Photoelectric Effect. Ionization occurs when matter interacts with light of sufficient energy (Heinrich Hertz, 1886)