Collisional focusing

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IUPAC RECOMMENDATIONS 2013
Collisional focusing
Effect where collisions with a buffer gas in a radio-frequency ion trap or transmission quadrupole causes ions to lose translational energy and concentrate at the center of the trap or axis of the linear quadrupole. The effect increases with gas pressure up to a point where ion scattering becomes the dominant process.
Related Term(s):
Reference(s):

D. J. Douglas, J. B. French. J. Am. Soc. Mass Spectrom. 3, 398 (1992). (http://dx.doi.org/10.1016/1044-0305(92)87067-9 )

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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