%0 Journal Article
%A Overstreet, Cale
%A Cooper, Jacob
%A O'Quinn, Eric
%A Cureton, William
%A Palomares, Raul
%A Leys, Julia
%A Deissmann, Guido
%A Neumeier, Stefan
%A Chen, Chien-Hung
%A Lang, Maik
%T Structural stability of REE-PO4 (REE = Sm,Tb) under swift heavy ion irradiation
%J Nuclear instruments & methods in physics research / B
%V 527
%@ 0168-583X
%C Amsterdam [u.a.]
%I Elsevier
%M FZJ-2022-02993
%P 34 - 39
%D 2022
%X Rare earth element (REE) phosphates are an attractive host matrix for long-lived radionuclides from nuclear waste because of the radiation tolerance exhibited by naturally occurring REE phosphate specimens. Here we show that SmPO4 (monazite structure) and TbPO4 (xenotime structure) exhibit a similar amorphization response to swift heavy ion irradiation despite different starting structures. SmPO4 and TbPO4 were irradiated with 1.1 GeV Au ions and analyzed using synchrotron-based X-ray diffraction (XRD), Raman spectroscopy, and transmission electron microscopy (TEM). The radiation response of the phosphates was evaluated by extracting the amorphous fraction at each irradiation fluence, and a single-impact model was used to determine the amorphous cross section and track diameter. Amorphization within individual ion tracks was confirmed using head-on TEM imaging, and the amorphous track size agreed with the value deduced by XRD analysis. Raman measurements were performed to qualitatively confirm the ion-induced crystalline-to-amorphous transformation which proceeds similarly for both phosphates.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000874682100005
%R 10.1016/j.nimb.2022.07.014
%U https://juser.fz-juelich.de/record/909075