Ion tracks in apatite
does annealing rate depend on pre-anealing sample preparation?
Palavras-chave:Nuclear waste ceramics, Thermogeochronometers
The resistance of radiation damage (latent fission tracks, metamictization) in minerals has been studied for decades. The aim of these studies is the employment of such materials as nuclear waste ceramics and thermo-geochronometers. The last is based on the knowledge of annealing kinetics and the Principle of Equivalent Time, which states that the reduction of damage by a thermal treatment (annealing) is independent from previous thermal history. We present preliminary results for reduction in projected length for fossil and pre-annealed apatite samples irradiated with 152 Sm ions (?150MeV and 45°). It was found that projected length in fossil samples are more resistent to annealing.
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