TY  - JOUR
AU  - Overstreet, Cale
AU  - Cooper, Jacob
AU  - O'Quinn, Eric
AU  - Cureton, William
AU  - Palomares, Raul
AU  - Leys, Julia
AU  - Deissmann, Guido
AU  - Neumeier, Stefan
AU  - Chen, Chien-Hung
AU  - Lang, Maik
TI  - Structural stability of REE-PO4 (REE = Sm,Tb) under swift heavy ion irradiation
JO  - Nuclear instruments & methods in physics research / B
VL  - 527
SN  - 0168-583X
CY  - Amsterdam [u.a.]
PB  - Elsevier
M1  - FZJ-2022-02993
SP  - 34 - 39
PY  - 2022
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000874682100005
DO  - DOI:10.1016/j.nimb.2022.07.014
UR  - https://juser.fz-juelich.de/record/909075
ER  -