Photoelectron spectroscopy
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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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Photoelectron spectroscopy

Photoelectron Spectroscopy

  • Lecture 7 – instrumental details

    • Electron detectors

    • Instrumental examples


Electron detectors

Electron Detectors

Channel Electron Multiplier

Microchannel Plate

CCD detectors can also be used, typically with a

phosphor screen to convert electrons to photons


Examples of spectrometers

Examples of Spectrometers


Photoelectron spectroscopy

Plus voltage

Minus voltage

Electron Kinetic

Energy Analyzer

Electron

Counter

Computer

Control

Gas-Phase Photoelectron Instrument

+

Sample

Chamber

Photon

Source

Photon Induces the

Photoelectric Effect.

Electrons are separated

according to

kinetic energy

Output is plot of

Ionization Energy

vs. Counts


Photoelectron spectroscopy

Surface Photoelectron Instrument

Sample Prep

and Storage

Fast

Entry

Main

Analysis


Photoelectron spectroscopy

Photoelectron Imaging Instrument


Photoelectron spectroscopy

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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