transparency range

transparency range

[tranz′par·ən·sē ‚rānj]
(nuclear physics)
A postulated energy range for extremely high-energy heavy-ion collisions in which the projectile passes through the target and emerges with its temperature and density raised to the point at which a quark-gluon plasma forms.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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There are two energy ranges, says Arthur Proskanzer of LBL, where quark-gluon plasmas are possible: the stopping range and the transparency range. In the stopping range, the target stops the projectile, the protons and neutrons of target and projectile are jumbled together in a fireball, and what ultimately comes out of the fireball can no longer be identified as from one or the other.
In the transparency range the projectile goes through the target and comes out somewhat slowed but still identifiable.

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