Mass-analyzed ion kinetic energy spectrometry

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Mass-analyzed ion kinetic energy spectrometry (MIKES)
Deprecated: direct analysis of daughter ions (DADI).

Procedure by which translational energy spectra are obtained from a sector mass spectrometer that incorporates at least one magnetic sector plus one electric sector in reverse geometry (a magnetic sector followed by an electric sector).

Note 1: In this context, kinetic energy is interpreted as translational rather than vibrational or rotational kinetic energy.
Note 2: The accelerating potential, V, and the magnetic flux density, B, are set at fixed values to m/z select the precursor ions, which are then allowed to dissociate or to react in a field-free region between the two sectors. The translational energy-to-charge ratios of the various product ions are analyzed by scanning the electric sector field E. The width of a product ion spectral peak is related to the kinetic energy release distribution for the dissociation process.
Related Term(s):

J. H. Beynon, R. G. Cooks. Res. Dev. 22, 26 (1971).

From Definitions of Terms Relating to Mass Spectrometry (IUPAC Recommendations 2013); DOI: 10.1351/PAC-REC-06-04-06 © IUPAC 2013.

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