DETERMINATION OF SURFACES AND SPECIFIC INTERFACES BY CENTRAL SCATTERING OF X RADIATION. II. EXPERIMENTAL RESEARCH

An account is given of the experimental studies carried out to find. in different cases, the best conditions of applying of the theoretical results, in particular, to the determination of specific surfaces. After a survey of the experimental difficulties to be overcome and of the main sources of errors in the absolute measurement of the scattering intensity, it is shown that the conditions of application depend upon the magnitude of the internal structure. For extreme structures, only one method is applicable: an attenuator must be used; for intermediate structures, the use of sufficiently thick samples ensures that the scattered and directly transmitted intensities have the same range of magnitude. Examples are given of the different ranges of structure and a comparison is made of the methods used in the case of intermediate structures. (auth)