Irradiation Effects of Swift Heavy Ions Detected by Refractive Index Depth Profiling

Evolution of depth profiles of the refractive index in Y3Al5O12 (YAG) crystals were studied under 200 MeV 136Xe14+ ion irradiation, since the index can be related with the stress change and/or the defect formation by the irradiation. Using the prism-coupling and the end-surface coupling methods, various waveguide (WG) modes were detected. Then, the index depth profiles were determined by reproducing the observed WG modes. The index changes were observed at three different depth regions; (i) a sharp dip at 13 μm in depth, which is attributed to the nuclear stopping Sn peak, (ii) a plateau near the surface between 0 and 3 μm in depth, which can be ascribed to the electronic stopping Se, since Se has a very broad peak at the surface, and (iii) a broad peak at 6 μm in depth. Since the last peak is ascribed to neither of Se nor Sn peak, it could be attributed to the synergy effect of Se and Sn.

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Refractive index changes in amorphous SiO2 (silica) by swift ion irradiation

Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms ◽

10.1016/j.nimb.2011.12.057 ◽

2012 ◽

Vol 277 ◽

pp. 126-130 ◽

Cited By ~ 11

Author(s):

O. Peña-Rodríguez ◽

J. Manzano-Santamaría ◽

J. Olivares ◽

A. Rivera ◽

F. Agulló-López

Keyword(s):

Refractive Index ◽

Ion Irradiation ◽

Amorphous Sio2 ◽

Index Changes

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Structural defects induced by heavy-ion irradiation in superconducting oxides

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100151520 ◽

1993 ◽

Vol 51 ◽

pp. 1138-1139

Author(s):

Yimei Zhu ◽

H. Zhang ◽

Z.X. Cai ◽

R.C. Budhani ◽

D.O. Welch ◽

...

Keyword(s):

Heavy Ions ◽

Defect Formation ◽

Ion Irradiation ◽

Ion Beam ◽

Amorphous Region ◽

Heavy Ion ◽

Microscopy Study ◽

Dynamical Theory ◽

Structural Defects ◽

Hole Density

We studied the the structure and properties of high Tc superconductors using heavy ions. While irradiation of YBa2Cu3O7-δ (hereafter denoted as 123) with 300 MeV Au+24 and 276 MeV Ag+21 ions produces columns of amorphous tracks along the ion trajectories, such defects are only created occasionally during irradiation with 236 MeV Cu+18, and are not induced with 182 MeV Si+13. A comprehensive electron microscopy study of defect formation in Bi2Sr2Ca2Cu3Ox, and in oxygen-reduced and ozone-treated 123, shows that the degree of radiation damage (the size and the shape of the defect) by the heavy ions depends on: (a) the rate at which ions lose their energy in the target; (b) crystallographic orientations with respect to the incident ion-beam (Fig.1); (c) thermal conductivity and chemical state (eg. oxygen concentration of 123) of the sample, and (d) the extent of pre-existing defects in the crystal. Calculation and simulation of the strain contrast surrounding the amorphous column using two-beam dynamical theory agree well with the observations and suggest that the reduced hole density observed in the crystal near the amorphous region is mainly due to lattice distortion.

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Thermal and long-term stability of fast-ion-irradiation-induced refractive index changes in lithium niobate crystals

Applied Physics A ◽

10.1007/s00339-009-5475-9 ◽

2009 ◽

Vol 98 (4) ◽

pp. 909-912 ◽

Cited By ~ 5

Author(s):

Mohammad-Reza Zamani-Meymian ◽

Lena Jentjens ◽

Niels L. Raeth ◽

Konrad Peithmann ◽

Karl Maier

Keyword(s):

Refractive Index ◽

Lithium Niobate ◽

Ion Irradiation ◽

Term Stability ◽

Long Term Stability ◽

Index Changes ◽

Fast Ion ◽

Lithium Niobate Crystals

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Review of Swift Heavy Ion Irradiation Effects in CeO2

Quantum Beam Science ◽

10.3390/qubs5020019 ◽

2021 ◽

Vol 5 (2) ◽

pp. 19

Author(s):

William F. Cureton ◽

Cameron L. Tracy ◽

Maik Lang

Keyword(s):

Heavy Ions ◽

Defect Formation ◽

Ion Irradiation ◽

Ion Beam ◽

Impurity Content ◽

Heavy Ion ◽

Atomic Scale ◽

Experimental Conditions ◽

Swift Heavy Ions ◽

Wide Range

Cerium dioxide (CeO2) exhibits complex behavior when irradiated with swift heavy ions. Modifications to this material originate from the production of atomic-scale defects, which accumulate and induce changes to the microstructure, chemistry, and material properties. As such, characterizing its radiation response requires a wide range of complementary characterization techniques to elucidate the defect formation and stability over multiple length scales, such as X-ray and neutron scattering, optical spectroscopy, and electron microscopy. In this article, recent experimental efforts are reviewed in order to holistically assess the current understanding and knowledge gaps regarding the underlying physical mechanisms that dictate the response of CeO2 and related materials to irradiation with swift heavy ions. The recent application of novel experimental techniques has provided additional insight into the structural and chemical behavior of irradiation-induced defects, from the local, atomic-scale arrangement to the long-range structure. However, future work must carefully account for the influence of experimental conditions, with respect to both sample properties (e.g., grain size and impurity content) and ion-beam parameters (e.g., ion mass and energy), to facilitate a more direct comparison of experimental results.

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Xenon ion irradiation of superconducting YBa2Cu3O7 thin films

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100173595 ◽

1990 ◽

Vol 48 (4) ◽

pp. 92-93

Author(s):

H. Watanabe ◽

B. Kabius ◽

B. Roas ◽

K. Urban

Keyword(s):

Defect Formation ◽

Ion Irradiation ◽

High Resolution Electron Microscopy ◽

Structural Disorder ◽

Flux Lines ◽

Pinning Effect ◽

Magnetic Flux Lines ◽

Resolution Electron ◽

Radiation Induced ◽

Induced Defects

Recently it was reported that the critical current density(Jc) of YBa2Cu2O7, in the presence of magnetic field, is enhanced by ion irradiation. The enhancement is thought to be due to the pinning of the magnetic flux lines by radiation-induced defects or by structural disorder. The aim of the present study was to understand the fundamental mechanisms of the defect formation in association with the pinning effect in YBa2Cu3O7 by means of high-resolution electron microscopy(HRTEM).The YBa2Cu3O7 specimens were prepared by laser ablation in an insitu process. During deposition, a substrate temperature and oxygen atmosphere were kept at about 1073 K and 0.4 mbar, respectively. In this way high quality epitaxially films can be obtained with the caxis parallel to the <100 > SrTiO3 substrate normal. The specimens were irradiated at a temperature of 77 K with 173 MeV Xe ions up to a dose of 3.0 × 1016 m−2.

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