Damage along swift heavy ion trajectory

Rymzhanov, R.A.; Горбунов, С.; Medvedev, Nikita; Волков, А. Е.

doi:10.1016/j.nimb.2018.11.034

Cited by 32 publications

(37 citation statements)

References 43 publications

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“…But large amorphous tracks are detected in YAG with the most “complex” lattice structure (the largest number of peaks). Reference 34 showed that SHI irradiation of Mg 2 SiO 4 with a “complex” structure produces amorphous tracks which conforms to the presented trend. The lattice of Al 2 O 3 fills an intermediate “complexity” here, showing partial track formation.…”

Section: Discussionsupporting

confidence: 76%

Recrystallization as the governing mechanism of ion track formation

Rymzhanov

Medvedev

O’Connell

et al. 2019

Sci Rep

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Response of dielectric crystals: MgO, Al 2 O 3 and Y 3 Al 5 O 12 (YAG) to irradiation with 167 MeV Xe ions decelerating in the electronic stopping regime is studied. Comprehensive simulations demonstrated that despite similar ion energy losses and the initial excitation kinetics of the electronic systems and lattices, significant differences occur among final structures of ion tracks in these materials, supported by experiments. No ion tracks appeared in MgO, whereas discontinuous distorted crystalline tracks of ~2 nm in diameter were observed in Al 2 O 3 and continuous amorphous tracks were detected in YAG. These track structures in Al 2 O 3 and YAG were confirmed by high resolution TEM data. The simulations enabled us to identify recrystallization as the dominant mechanism governing formation of detected tracks in these oxides. We analyzed effects of the viscosity in molten state, lattice structure and difference in the kinetics of metallic and oxygen sublattices at the crystallization surface on damage recovery in tracks.

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Section: Discussionsupporting

confidence: 76%

Recrystallization as the governing mechanism of ion track formation

Rymzhanov

Medvedev

O’Connell

et al. 2019

Sci Rep

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“…These energies correspond to the threshold energy loss (~16 keV/nm) necessary to produce structure transformations of olivine (see details in ref. 20 ). The ranges of these ions (750 μm for U and 85 μm for Xe) were used as the total track lengths for the modelling of etching.…”

Section: Modeling Of Chemical Etching Of Shi Tracksmentioning

confidence: 99%

“…In particular, WCE of ion tracks 12 in crystalline olivine (Mg 0.11 Fe 0.89 ) 2 SiO 4 from meteorites pallasites is used to register parameters of heavy nuclei from galactic cosmic rays (GCR) 12,14,16,19 . After SHI passage, a track core of 1 ÷ 10 nm diameter 20 containing highly damaged material and high concentrations of Fe + cations reduced by spreading electrons appears along the heavy ion path in olivine. Ensemble of reduced Fe + cations propagates up to distances of 100–300 nm from the ion trajectory forming a halo of the track core 21 .…”

Section: Introductionmentioning

confidence: 99%

Dependence of track etching kinetics on chemical reactivity around the ion path

Горбунов

Rymzhanov

Волков

2019

Sci Rep

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Etching kinetics of swift heavy ions (SHI) tracks in olivine is investigated in frame of experimentally verified numerical approach. The model takes into account variation of induced chemical reactivity of the material around the whole ion trajectory with the nanometric accuracy. This enables a quantitative description of wet chemical etching of SHI tracks of different lengths and orientations towards to the sample surface. It is demonstrated that two different modes of etching, governed by diffusion of etchant molecules and by their reaction with the material must be observed in experiments using techniques with different resolution thresholds. Applicability limits of the optical microscopy for detection of heavy ion parameters by measuring of the lengthwise etching rates of the ion track are discussed.

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“…This reduces the energy density. The evolution of the delta-electron spectra as a function of the ion energy (velocity) and its consequence on the produced tracks were recently studied theoretically in detail [105]. With knowledge on the dynamics, the electronic excitation of the target, and the transport of electrons, holes, and photons, one can address track formation.…”

Section: Modeling Of Electronic Processesmentioning

confidence: 99%

Fundamental Phenomena and Applications of Swift Heavy Ion Irradiations

Lang

Djurabekova

Medvedev

et al. 2020

Comprehensive Nuclear Materials

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This review concentrates on the specific properties and characteristics of damage structures generated with high-energy ions in the electronic energy loss regime. Irradiation experiments with so-called swift heavy ions (SHI) find applications in many different fields, with examples presented in ion-track nanotechnology, radiation hardness analysis of functional materials, and laboratory tests of cosmic radiation. The basics of the SHI-solid interaction are described with special attention to processes in the electronic subsystem. The broad spectrum of damage phenomena is exemplified for various materials and material classes, along with a description of typical characterization techniques. The review also presents state-of-the-art modeling efforts that try to account for the complexity of the coupled processes of the electronic and atomic subsystems. Finally, the relevance of SHI phenomena for effects induced by fission fragments in nuclear fuels and how this knowledge can be applied to better estimate damage risks in nuclear materials is discussed.

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Damage along swift heavy ion trajectory

Cited by 32 publications

References 43 publications

Recrystallization as the governing mechanism of ion track formation

Recrystallization as the governing mechanism of ion track formation

Dependence of track etching kinetics on chemical reactivity around the ion path

Fundamental Phenomena and Applications of Swift Heavy Ion Irradiations

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