cosmic-ray track
cosmic-ray track The interaction of ionizing cosmic rays (see cosmic radiation) with mineral surfaces produces solid-state damage which, when etched with acid, is revealed as tracks of varying length. Most tracks are produced by iron group nucleii (nuclear charge (Z) 18–28, VH ions). Track lengths due to galactic cosmic rays may extend to depths of 20cm. In contrast, solar flare tracks are mostly less than one millimetre in length. Track densities, typically about 1012/m2 on unshielded lunar mineral surfaces, provide a measure of exposure age.
More From encyclopedia.com
track , track1 / trak/ • n. 1. a rough path or minor road, typically one beaten by use rather than constructed: follow the track to the farm a forest track.… Fission-track Dating , fission-track dating Charged particles, from the spontaneous fission of 238U in minerals and in natural and synthetic glasses, leave a trail of damag… Skagerrak , Skagerrak •blackjack • applejack • flapjack •steeplejack • cheapjack • skipjack •hijack, skyjack •bootjack • lumberjack • crackerjack •ack-ack • clic… Pontianak , Pontianak •blackjack • applejack • flapjack •steeplejack • cheapjack • skipjack •hijack, skyjack •bootjack • lumberjack • crackerjack •ack-ack • clic… Track And Field Athletics , The various disciplines that come under the umbrella of the sport of track and field are among the oldest of the world's athletic contests. Track and… Asv Inc , 840 Lily Lane
Grand Rapids, Minnesota 55744
U.S.A.
Telephone: (218) 327-3434
Toll Free: (800) 346-5954
Fax: (218) 327-9122
Web site: http://www.asvi.…
You Might Also Like
NEARBY TERMS
cosmic-ray track