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@ARTICLE{Lushchik:296998,
author = {Lushchik, A. and Lushchik, Ch. and Popov, A. I. and
Schwartz, K. and Shablonin, E. and Vasil’chenko, E.},
title = {{I}nfluence of complex impurity centres on radiation damage
in wide-gap metal oxides},
journal = {Nuclear instruments $\&$ methods in physics research / B},
volume = {374},
issn = {0168-583X},
address = {Amsterdam [u.a.]},
publisher = {Elsevier},
reportid = {PUBDB-2016-01751},
pages = {90-96},
year = {2015},
note = {(c) EURATOM. Published by Elsevier B.V.},
abstract = {Different mechanisms of radiation damage of wide-gap metal
oxides as well as a dual influence of impurity ions on the
efficiency of radiation damage have been considered on the
example of binary ionic MgO and complex ionic–covalent
$Lu_{3}Al_{5}O_{12}$ single crystals. Particular emphasis
has been placed on irradiation with $\sim$2 GeV heavy ions
($^{197}Au, ^{209}Bi, ^{238}U$, fluence of 10$^{12}$
ions/cm$^{2}$) providing extremely high density of
electronic excitations within ion tracks. Besides knock-out
mechanism for Frenkel pair formation, the additional
mechanism through the collapse of mobile discrete breathers
at certain lattice places (e.g., complex impurity centres)
leads to the creation of complex defects that involve a
large number of host atoms. The experimental manifestations
of the radiation creation of intrinsic and impurity antisite
defects (Lu|$_{Al}$ or Ce|$_{Al}$ – a heavy ion in a wrong
cation site) have been detected in LuAG and $LuAG:Ce^{3+}$
single crystals. Light doping of LuAG causes a small
enhancement of radiation resistance, while pair impurity
centres (for instance, $Ce|_{Lu}–Ce|_{Al}$ or
$Cr^{3+}–Cr^{3+}$ in MgO) are formed with a rise of
impurity concentration. These complex impurity centres as
well as radiation-induced intrinsic antisite defects
(Lu|$_{Al}$ strongly interacting with Lu in a regular site)
tentatively serve as the places for breathers collapse, thus
decreasing the material resistance against dense
irradiation.},
cin = {DOOR},
ddc = {530},
cid = {I:(DE-H253)HAS-User-20120731},
pnm = {899 - ohne Topic (POF3-899)},
pid = {G:(DE-HGF)POF3-899},
experiment = {EXP:(DE-H253)D-I-20150101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000375819500017},
doi = {10.1016/j.nimb.2015.07.004},
url = {https://bib-pubdb1.desy.de/record/296998},
}