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TitlePhotoluminescence and radioluminescence study of Eu and Mn doped RbMgF 3 nanoparticles
Publication TypeJournal Article
Year of Publication2013
AuthorsGaedtke, C., Williams G.V.M., Janssens S., Raymond S., and Clarke D.J.
JournalRadiation Measurements
Pagination187 - 191
Date Published2013
ISSN13504487 (ISSN)
KeywordsDoped sample, energy transfer, Fluoroperovskites, High dose, Manganese, Mn-doped, Nanoparticles, Nonradiative decays, Photoluminescence, PL lifetime, Radiation hard, Radio-luminescence
AbstractPhotoluminescence (PL) and radioluminescence (RL) measurements were made on RbMgF3 nanoparticles doped with Mn or Eu. We find that the Mn doped samples contain only Mn2+ and the Eu doped samples contained Eu 3+ and Eu2+. The Mn2+ PL lifetimes are nearly independent of Mn2+ concentration but the RL spectra increases at high doses for 1% Mn2+ and decreases slightly at high doses for 5% Mn2+. The 5% Mn2+ is more radiation hard and the integrated RL intensity only starts to significantly decrease above 1 kGy. The Eu doped sample displays a PL lifetime that is lower for high Eu concentrations and this can be accounted for by a model where there is energy transfer between Eu3+ and more nonradiative decay sites at the surface. The RL is independent of dose between 10 mGy and ∼200 Gy, where the 1% Eu sample is more radiation hard and the Eu3+ RL intensity has decreased by only 3.4% at 6.7 kGy. © 2013 Elsevier B.V. All rights reserved.

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