Porous fission fragment tracks in fluorapatite
نویسندگان
چکیده
Weixing Li,1,2,3 Lumin Wang,1,2,* Kai Sun,1 Maik Lang,3 Christina Trautmann,4 and Rodney C. Ewing1,2,3,† 1Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109-2104, USA 2Department of Nuclear Engineering and Radiological Sciences, University of Michigan, Ann Arbor, Michigan 48109-2104, USA 3Department of Geological Sciences, University of Michigan, Ann Arbor, Michigan 48109-1005, USA 4GSI Helmholtz Centre for Heavy Ion Research, Planckstr. 1, 64291 Darmstadt, Germany Received 17 July 2010; published 18 October 2010
منابع مشابه
Highly porous tracks in fluorapatite
In volatile-rich fluorapatite, which represents 70 % of all fission track age-determinations, tracks produced along the trajectories of fission fragments have been considered to be cylinders of radiation-damaged amorphous material, similar to tracks in other minerals, such as zircon [1]. The atomic-scale structure of unetched fission tracks controls temperature-induced “fading” and finally lead...
متن کاملThermal annealing mechanisms of latent tracks: Apatite versus zircon
Etched tracks of apatite and zircon are both widely used for the determination of the thermal history of Earth’s crust. The present understanding of the annealing process is largely limited to mathematical fits to data for etched track-lengths as a function of temperature and time. Details of the annealing of unetched, latent tracks at the atomic scale have remained elusive, as the original tra...
متن کاملFission Fragments Track- Etched Pores in Borate Glass
A study has been made to investigate the detection sensitivity of Borate Glass for the heavily ionizing fission fragment tracks. The latent damage tracks produced by fission fragments in Borate Glass, with and without Aluminium Oxide as an additive, have been studied under a high resolution scanning electron microscope. Tracks have been found and studied only in the Borate Glass samples with no...
متن کاملEvaluation of Fluorapatite as a Waste-Form Material
Fluorapatite, fluorinated calcium phosphate, has been identified as a potential matrix for the entombment of the zirconium fluoride fission product waste stream from the proposed FLEX process. If the efficacy of fluorapatitebased waste-storage can be demonstrated, then new and potentially more-efficient options for handling and separating high-level wastes, based on fluoride-salt extraction, wi...
متن کاملFISSION FRAGMENT ANGULAR ANISOTROPIES AND INERTIA PARAMETERS
An analysis of selected fission fragment angular distributions from helium-ion induced fission is made using an exact theoretical expression. Theoretical anisotropies obtained with the transition state model are compared with their corresponding values deduced from the statistical scission model. The nuclear moment of inertia extracted from the model calculations are compared with their est...
متن کامل