Diffuse neutron scattering from crystal imperfections

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Abstract
The most extensively studied type of structural diffuse scattering in recent years has been the small angle scattering centred on 000. Examples are given illustrating the types of investigation that can now be made: precipitation in alloys ( in situ kinetic studies); fracture of alloys ( in situ mechanical studies); radiation ‘damage’ in silicon (correlation with spectroscopic measurements); radiation damage in gallium arsenide (anisotropic effects). In comparison with small angle neutron scattering, much less work has been done on other types of diffuse scattering. Some possible developments in this field are indicated by the computer simulation of relaxation effects around impurity atoms.