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| Home > Publications database > Atomistic modeling and experimental studies of radiation damage in monazite-type LaPO$_{4}$ ceramics |
| Journal Article | FZJ-2016-05404 |
; ; ; ; ;
2017
Elsevier
Amsterdam [u.a.]
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Please use a persistent id in citations: doi:10.1016/j.nimb.2016.09.031
Abstract: We simulated the threshold displacement energies (EdEd), the related displacement and defect formation probabilities, and the energy barriers in LaPO4 monazite-type ceramics. The obtained EdEd values for La, P, O primary knock-on atoms (PKA) are 56 eV, 75 eV and 8 eV, respectively. We found that these energies can be correlated with the energy barriers that separate the defect from the initial states. The EdEd values are about twice the values of energy barriers, which is explained through an efficient dissipation of the PKA kinetic energy in the considered system. The computed EdEd were used in simulations of the extent of radiation damage in La0.2Gd0.8PO4 solid solution, investigated experimentally. We found that this lanthanide phosphate fully amorphises in the ion beam experiments for fluences higher than ∼1013 ions/cm2.
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