Photoelectron Spectroscopy PES of Elements A PHET Simulation

Photoelectron Spectroscopy   PHET Computer Simulation


Photoelectron Spectroscopy provides information about the energy required to potentially remove each and every electron in an atom. When a “packet of energy” strikes an electron, the electron absorbs all of the energy.

Some of the energy is used to overcome the binding energy of that electron and some of the energy is used to impart kinetic energy to the ejected electron. The Law of Conservation of Energy applies. The kinetic energy of the electron can be measured using an electron energy analyzer.

KE ejected electron = hνincoming energy  – Φ      where Φ is the binding energy of an electron

Electrons ejected from an atom using X-‐rays or ultra-violet radiation are called photoelectrons. The photoelectron experiment can remove any electron in an atom, provided the appropriate energy is supplied.

Since the kinetic energy of these ejected electrons can be measured and the number of electrons counted, a photoelectron spectrum can be constructed.


© Copyright 2012 Email: Randy Sullivan, University of Oregon Chemistry Department and UO Libraries Interactive Media Group