DEPENDENCE OF NUCLEAR DIFFRACTION ON THE AZIMUTHAL ANGLE - (002)-REFLECTIONS AND (0010)-REFLECTIONS OF YIG

Nuclear diffraction of synchrotron radiation has been investigated using YIG single crystals in different scattering geometries. Time resolved quantum beat spectra of pure nuclear (002) and (0010) Bragg reflections were observed in a set-up where the hyperfine interaction was kept constant, while the azimuthal angle in the (001) surface between the [100] axis and the scattering plane (kin, kout) was varied. The time spectra were analyzed by means of the dynamical theory for coherent nuclear scattering. The results revealed the high sensitivity of this experimental technique on the complete set of hyperfine interaction parameters and on the specific geometrical conditions for nuclear diffraction of polarized γ-rays. © 1990 J.C. Baltzer A.G. Scientific Publishing Company.