CHP Home GenChem     Analytical     Instrumentation     Index   

Resonance-Ionization Mass Spectrometry (RIMS)


Resonance-ionization mass spectrometry (RIMS) uses photons to promote an atom or molecule above its ionization potential to create an ion. Since each element has a unique energy level structure, RIMS provides a selective ionization method.

Two examples of RIMS processes

In the example on the left one photon resonantly excites an atom to an excited state and a second photon promotes the atom above its ionization potential. The example on the right shows a fully resonant three-photon RIMS process that terminates on an autoionizing level.


Please refer to the introductory document on Mass spectrometry.


RIMS is useful for studying the electronic structure of atoms or molecules and to make quantitative measurements of analyte concentrations.

Related topics:

 Top of Page   
 Copyright © 2000 by Brian M. Tissue, all rights reserved.