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'''Associative ionization''' is a gas phase reaction in which two [[atom]]s or [[molecule]]s interact to form a single product [[ion]].<ref>{{GoldBookRef|title=associative ionization|file= A00475}}</ref> One or both of the interacting species may have excess [[internal energy]].

For example

:<math>A^* + B \to AB^{+\bullet} + e^-</math>

where species A with excess internal energy (indicated by the asterisk) interacts with B to form the ion AB<sup>+</sup>.

==See also==
*[[Chemi-ionization]]
*[[Penning ionization]]

==References==
{{Reflist}}

==References==
{{Reflist}}
{{refbegin}}
*{{cite journal |author=Jones DM, Dahler JS |title=Theory of associative ionization  |date=April 1988 |pmid=9900022 |journal=[[Physical Review A]]|volume=37|issue=8 |pages=2916–2933|doi= 10.1103/PhysRevA.37.2916|bibcode = 1988PhRvA..37.2916J }}
*{{Cite journal | last = Cohen | first =  James S. | year = 1976 | title = Multistate curve-crossing model for scattering: Associative ionization and excitation transfer in helium | journal = Physical Review A | volume = 13 | pages = 99 | doi = 10.1103/PhysRevA.13.99 |bibcode = 1976PhRvA..13...99C }}
{{refend}}

[[Category:Ion source]]


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