MOSSBAUER DIFFRACTION MEASUREMENTS ON POLYCRYSTALLINE BCC IRON

In the early days of Mossbauer spectroscopy, it was demonstrated that coherent scattering of photons emitted by a Mossbauer source can be ob served. In spite of the fact that scattering experiments could give in formation not accessible by the absorption method, they are not widely used. The reasons for this are, on the one hand, experimental difficu lties, and on the other hand, the form of the samples, which should be large single crystals in most cases. In this work, we present a Mossb auer diffraction measurement on polycrystalline bce iron where these p roblems have been overcome. We demonstrate that using the kinematical theory of gamma-ray diffraction, useful information on the relative or ientation of the crystallographic axis to the hyperfine field directio ns can be subtracted.