Irradiated rare-earth-doped powellite single crystal probed by confocal Raman mapping and transmission electron microscopy - IN2P3 - Institut national de physique nucléaire et de physique des particules Access content directly
Journal Articles Journal of Raman Spectroscopy Year : 2014

Irradiated rare-earth-doped powellite single crystal probed by confocal Raman mapping and transmission electron microscopy

Abstract

The irradiation‐induced damages and structure modifications of rare earths doped powellite single crystal have been precisely studied using optical and electron microscopy techniques, including optical interferometry, confocal micro‐Raman spectroscopy and transmission electron microscopy. The surface of powellite crystal pops out anisotropically after exposing under Ar ion beam, with a saturation swelling value of 2.0% along a‐axis and 1.3% along the c‐axis of powellite at high dose. Raman mapping on focused ion‐beam sections (5 × 3 µm2) perpendicular to the irradiated surface reveals that irradiation damage induces orientation‐dependent compressive stresses in powellite. However, no significant anisotropic effect has been found on the irradiation‐induced structural disorder in powellite. At low dose (0.012 dpa), the main irradiation‐induced defects created in powellite crystal are small defect clusters. By comparison, the dominant kinds of defects in high‐dose (5.0 dpa) sample are dislocations loops and networks

Dates and versions

in2p3-00991529 , version 1 (15-05-2014)

Identifiers

Cite

X. Wang, Gérard Panczer, D. de Ligny, Vincent Motto-Ros, J. Yu, et al.. Irradiated rare-earth-doped powellite single crystal probed by confocal Raman mapping and transmission electron microscopy. Journal of Raman Spectroscopy, 2014, 45 (5), pp.383-391. ⟨10.1002/jrs.4472⟩. ⟨in2p3-00991529⟩
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