Radiation damage in spinel single crystals

Turos, A.; Matzke, Hj.; Drigo, A. V.; Sambo, A.; Falcone, R. W.

doi:10.1016/0168-583x(95)01353-9

Cited by 25 publications

(5 citation statements)

References 13 publications

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“…The intermediate phase was identified to be a ''rocksalt-like" structure, in which the oxygen sublattice maintains a ''pseudo" cubic close-packed arrangement (as in spinel), while the Mg and Al occupy randomly the octahedral lattice interstices [8]. The disorder on the Al and O sublattices but not on the Mg sublattice after ion irradiation has also been reported [9]. Under energetic electron (1 MeV) bombardment, the MgAl 2 O 4 underwent a progressive phase transformation (spinel ?…”

Section: Introductionmentioning

confidence: 93%

Electronic ionization induced atom migration in spinel MgAl2O4

Jiang

Spence

2010

Journal of Nuclear Materials

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Section: Introductionmentioning

confidence: 93%

Electronic ionization induced atom migration in spinel MgAl2O4

Jiang

Spence

2010

Journal of Nuclear Materials

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“…A more plausible explanation of the channeling results reported here is the formation of clusters composed of vacancies and at least one Cs atom. The formation of such clusters was already observed in ion-implanted ceramics and metals [13][14][15]. In these clusters impurity atoms may occupy lattice sites close to atomic rows in the 100 direction, which lead to shadowing effects (hence a decrease of the aligned backscattering yield) similar to those obtained in the case of fully substitutional positions.…”

mentioning

confidence: 59%

Location of fission products in zirconia single crystals

1999

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The lattice location of specific fission products (Cs and I) in zirconia single crystals was investigated by using Rutherford backscattering and channeling experiments. The fission products were introduced into the ZrO2 matrix up to a concentration of a few at.% by ion implantation. The ZrO2 single crystals are strongly damaged during the implantation process, and the damage creation is almost the same for Cs or I ion implantation. The location of the implanted fission products inside the host matrix depends on the nature of the impurity. A significant substitutional fraction is observed in the case of Cs ions at low concentration, whereas I ions mainly occupy random sites. These different site occupancies are likely correlated to specific impurity-defect interactions or phase formation which can affect the transport mechanisms of fission products in the confinement matrix.

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“…In spinel, magnesium cations form a diamond-like structure [13]. Several authors believe that the diamond-like magnesium cationic sublattice is responsible for the increased stability of MAS toward corpuscular impact [13,14]. In our studies, we assume that the mode associated with the tetrahedral cation, which has already undergone a high-energy change during crystal growth, remains unchanged after irradiation with SHI.…”

Section: Raman Spectramentioning

confidence: 86%

“…The decreased sensitivity of oxygen tetrahedra to the formation of defects via cationic mixing is due to the peculiarities of the magnesium cationic sublattice. In spinel, magnesium cations form a diamond-like structure [13]. Several authors believe that the diamond-like magnesium cationic sublattice is responsible for the increased stability of MAS toward corpuscular impact [13,14].…”

Section: Raman Spectramentioning

confidence: 99%

Unveiling the Structural and Optical Properties of MgAl2O4 Single Crystals Irradiated by Swift Heavy Ions

Akilbekov,

Kiryakov,

Dauletbekova

et al. 2024

Materials

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A synthetic single crystal of magnesium-aluminate spinel was irradiated perpendicularly to the (111) plane with swift heavy xenon ions with an energy of 220 MeV. The modified layer was attested based on Raman scattering spectra recorded while focusing on the surface. A decrease in surface crystallinity was observed, reflected in the changes in fundamental optical characteristics such as the band gap and the energies of static and dynamic disorder. In this study, we demonstrate, along with the modification of optical characteristics and the formation of a disordered layer, the creation of new optically active centers. The luminescent properties of these centers were analyzed. The effect of temperature flare-up in the 3.4 eV band of the excitation spectrum was determined. The low sensitivity of Cr3+ luminescence to SHI is demonstrated.

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Radiation damage in spinel single crystals

Cited by 25 publications

References 13 publications

Electronic ionization induced atom migration in spinel MgAl2O4

Electronic ionization induced atom migration in spinel MgAl2O4

Location of fission products in zirconia single crystals

Unveiling the Structural and Optical Properties of MgAl2O4 Single Crystals Irradiated by Swift Heavy Ions

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