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Investigation on helium bubbles in FeNiCr by small‐angle neutron scattering: Guinier analysis using a size‐dependent contrast factor
Author(s) -
Carsughi F.
Publication year - 1994
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889893010386
Subject(s) - helium , scattering , neutron scattering , small angle neutron scattering , small angle scattering , density contrast , materials science , structure factor , alloy , neutron , ternary operation , condensed matter physics , optics , physics , atomic physics , nuclear physics , astronomy , computer science , composite material , programming language
The helium bubbles produced by annealing a homogeneously implanted specimen of a model ternary alloy (FeNiCr) at a high temperature are characterized by a size‐dependent gas density. Hence, the contrast factor, which is given by the difference between the scattering‐length density of the matrix and of the inhomogeneities, is not constant. A quantitative analysis of the small‐angle neutron scattering data is performed taking into account a size‐dependent contrast factor. The Guinier radii found from the experimental data agree with those predicted by the theory under the assumption of a non‐constant factor.