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Photoelectron Spectroscopy

Photoelectron Spectroscopy. Lecture 7 – instrumental details Electron detectors Instrumental examples. Electron Detectors. Channel Electron Multiplier. Microchannel Plate. CCD detectors can also be used, typically with a phosphor screen to convert electrons to photons.

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Photoelectron Spectroscopy

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  1. Photoelectron Spectroscopy • Lecture 7 – instrumental details • Electron detectors • Instrumental examples

  2. Electron Detectors Channel Electron Multiplier Microchannel Plate CCD detectors can also be used, typically with a phosphor screen to convert electrons to photons

  3. Examples of Spectrometers

  4. Plus voltage Minus voltage Electron Kinetic Energy Analyzer Electron Counter Computer Control Gas-Phase Photoelectron Instrument hν + Sample Chamber Photon Source Photon Induces the Photoelectric Effect. Electrons are separated according to kinetic energy Output is plot of Ionization Energy vs. Counts

  5. Surface Photoelectron Instrument Sample Prep and Storage Fast Entry Main Analysis

  6. Photoelectron Imaging Instrument

  7. Mass-Selected Gas-Phase Photoelectron Instrument MCP (mass detector) Time-of-flight mass spectrometer magnet 2.5 m 5x10-11 Torr Time-of-flight magnetic botter photoelectron spectrometer 4.0 m Electrospray Ionization source Z-stack MCP (photoelectron detector)

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