Relativistic U-238 ion tracks in olivine and cosmic-ray track studies

Details Relativistic U-238 ion tracks in olivine and cosmic-ray track studies Relativistic U-238 ion tracks in olivine and cosmic-ray track studies

Aug 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984natur.310..397p&link_type=abstract

Nature (ISSN 0028-0836), vol. 310, Aug. 2, 1984, p. 397-399.

Computer Science

1

Cosmic Rays, Meteoritic Composition, Olivine, Particle Tracks, Uranium 238, Cosmochemistry, Heavy Ions, Ion Irradiation, Relativistic Particles

Scientific paper

Fossil nuclear tracks recorded in meteoritic material have been used by Fleischer et al. to identify cosmic ray nuclei heavier than Fe. Attempts to use tracks in meteorites to study the chemical composition of ultraheavy cosmic rays, however, have led to ambiguous results. The authors report here the first results on tracks of 238U ions of 190 MeV per nucleon in the mineral olivine. They show that the etchable part of a U ion trail is surprisingly long (nearly 3 mm). These results have an important bearing both on the interpretation of cosmic-ray tracks in lunar and meteoritic crystals, and on models of track formation in minerals.

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