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'''Large Ion'''

</dt><BR/>An atmospheric [[Ion|ion]] of relatively
large mass and low mobility which is produced by the attachment
of a [[Small Ion|small ion]] to an [[Aitken Nucleus|Aitken
nucleus]]. Also called ''slow ion, heavy ion, Langevin ion.''
</dd><BR/>''The ion density of large ions varies widely, depending
upon the degree of atmospheric pollution. Representative low-altitude
values might be 1000 per cubic centimeter in clean country air,
10,000 per cubic centimeter in an industrial area, and 100 per
cubic centimeter over the oceans.''
</dd>
==References==
''This article is based on NASA's [[NASA SP-7|Dictionary of Technical Terms for Aerospace Use]]''
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