PHOTOIONIZATION MASS SPECTROMETRY


 Photoionization can be employed in investigations aimed at understanding chemical kinetics mechanisms and isomeric product branching using mass spectrometry. In such cases, a high-energy photon, such as an X-ray or an ultraviolet photon, is used to dissolve stable gaseous molecules in a carrier gas such as He or Ar. A tunable photon energy can be used in conjunction with the charge ratio m/z to obtain a photoionization efficiency curve that can be used to fingerprint molecular and ionic species when a synchrotron light source is used.


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