Publication

SANS investigation of proton-irradiated EUROFER97

2004
Journal Articles

Abstract

Small angle neutron scattering experiments have been undertaken on the tempered martensitic steel EUROFER97 after proton irradiation at 250 and 350 degreesC and for doses of 0.3 and 1 dpa. It has been qualitatively shown that the scattering arises from distributions of irradiation-induced defects that peak below one nanometer in size (radius). The number density in the distribution increases with dose for each irradiation temperature. At the same dose, the density of the defects has been found much larger after irradiation at 250 degreesC than after 350 degreesC. The variation of ratio between the nuclear and magnetic scattering with dose suggests that the chemical composition of the nano-defects or helium content in the nano-bubbles is dose dependent. (C) 2004 Elsevier B.V. All rights reserved.

Official source

https://infoscience.epfl.ch/entities/publication/aa9845b9-e98f-44fe-85e1-4ef67fd62b4e

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2004
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/aa9845b9-e98f-44fe-85e1-4ef67fd62b4e

About this result

Related concepts (32)

Small-angle neutron scattering

Small-angle neutron scattering (SANS) is an experimental technique that uses elastic neutron scattering at small scattering angles to investigate the structure of various substances at a mesoscopic scale of about 1–100 nm. Small angle neutron scattering is in many respects very similar to small-angle X-ray scattering (SAXS); both techniques are jointly referred to as small-angle scattering (SAS).

Neutron scattering

Neutron scattering, the irregular dispersal of free neutrons by matter, can refer to either the naturally occurring physical process itself or to the man-made experimental techniques that use the natural process for investigating materials. The natural/physical phenomenon is of elemental importance in nuclear engineering and the nuclear sciences. Regarding the experimental technique, understanding and manipulating neutron scattering is fundamental to the applications used in crystallography, physics, physical chemistry, biophysics, and materials research.

Raman scattering

Raman scattering or the Raman effect (ˈrɑːmən) is the inelastic scattering of photons by matter, meaning that there is both an exchange of energy and a change in the light's direction. Typically this effect involves vibrational energy being gained by a molecule as incident photons from a visible laser are shifted to lower energy. This is called normal Stokes Raman scattering. The effect is exploited by chemists and physicists to gain information about materials for a variety of purposes by performing various forms of Raman spectroscopy.