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@ARTICLE{Leys:907661,
author = {Leys, Julia M. and Ji, Yaqi and Klinkenberg, Martina and
Kowalski, Piotr M. and Schlenz, Hartmut and Neumeier, Stefan
and Bosbach, Dirk and Deissmann, Guido},
title = {{M}onazite-type {S}m{PO}4 as potential nuclear waste form:
{I}nsights into radiation effects from ion-beam irradiation
and atomistic simulations},
journal = {Materials},
volume = {15},
number = {10},
issn = {1996-1944},
address = {Basel},
publisher = {MDPI},
reportid = {FZJ-2022-02140},
pages = {3434},
year = {2022},
abstract = {Single-phase monazite-type ceramics are considered as
potential host matrices for the conditioning of separated
plutonium and minor actinides. Sm-orthophosphates were
synthesised andtheir behaviour under irradiation was
investigated with respect to their long-term performance in
the repository environment. Sintered SmPO4 pellets and thin
lamellae were irradiated with 1, 3.5,and 7 MeV Au ions, up
to fluences of 5.1 × 1014 ions cm−2 to simulate ballistic
effects of recoiling nuclei resulting from α-decay of
incorporated actinides. Threshold displacement energies for
monazite-type SmPO4 subsequently used in SRIM/TRIM
simulations were derived from atomistic simulations. Raman
spectra obtained from irradiated lamellae revealed vast
amorphisation at the highestfluence used, although local
annealing effects were observed. The broadened, but still
discernible, band of the symmetrical stretching vibration in
SmPO4 and the negligible increase in P–O bondlengths
suggest that amorphisation of monazite is mainly due to a
breaking of Ln–O bonds. PO4 groups show structural
disorder in the local environment but seem to behave as
tight units. Annealingeffects observed during the
irradiation experiment and the distinctively lower dose
rates incurred in actinide bearing waste forms and potential
α-radiation-induced annealing effects indicatethat
SmPO4-based waste forms have a high potential for
withstanding amorphisation.},
cin = {IEK-6 / IEK-13},
ddc = {600},
cid = {I:(DE-Juel1)IEK-6-20101013 / I:(DE-Juel1)IEK-13-20190226},
pnm = {1411 - Nuclear Waste Disposal (POF4-141) / 1221 -
Fundamentals and Materials (POF4-122)},
pid = {G:(DE-HGF)POF4-1411 / G:(DE-HGF)POF4-1221},
typ = {PUB:(DE-HGF)16},
pubmed = {35629458},
UT = {WOS:000802681700001},
doi = {10.3390/ma15103434},
url = {https://juser.fz-juelich.de/record/907661},
}