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On the mechanisms of radiation damage and prospects of their suppression in complex metal oxides
Author(s) -
Lushchik Aleksandr,
Lushchik Cheslav,
Nagirnyi Vitali,
Pazylbek Sapargali,
Sidletskiy Oleg,
Schwartz Kurt,
Shablonin Evgeni,
Shugai Anna,
Vasil'chenko Evgeni
Publication year - 2013
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201200488
Subject(s) - cathodoluminescence , ion , materials science , irradiation , fluence , spectroscopy , annealing (glass) , metal , luminescence , radiation resistance , impurity , radiation , absorption spectroscopy , atomic physics , analytical chemistry (journal) , chemistry , physics , optics , optoelectronics , metallurgy , organic chemistry , chromatography , quantum mechanics , nuclear physics
The influence of some impurity ions on the increase/decrease in the resistance against irradiation of metal oxides with X‐rays and electrons (low‐dense excitation) or ∼2 GeV Au 198 and U 238 ions providing a superhigh density of electronic excitations along cylindrical tracks (LET > 30 keV nm −1 ) has been investigated for fcc MgO single crystals with close ion masses or Lu 3 Al 5 O 12 and Gd 2 SiO 5 with large unit cells and heavy cations. The radiation effects have been studied using the methods of low‐temperature vacuum ultraviolet spectroscopy (up to 40 eV), cathodoluminescence and thermoactivation spectroscopy. The step‐by‐step annealing of the radiation‐induced absorption, scattering, and luminescence has been performed at the heating of irradiated crystals up to ∼70% of a melting point. Possible experimental manifestations of the temperature‐stable nanosize 3D defects created, according to theoretical predictions, via rearrangement of many host ions at the collapse of discrete solitons (breathers) are detected in Lu 3 Al 5 O 12 and Gd 2 SiO 5 crystals irradiated with swift heavy ions (fluence of 10 12 ions cm −2 ).