PERTURBED NUCLEAR-SCATTERING OF SYNCHROTRON-RADIATION

Mossbauer spectroscopy in the time domain with SR as a source may become a powerful tool in investigations of time-dependent hyperfine interactions caused by external perturbations. This is firstly due to the easy possibility to synchronize the excitation of the nuclei with an external perturbation and secondly due to the insensitivity of Mossbauer time spectra to mechanical vibrations which are generated in samples by these perturbations. As a particular case of perturbed nuclear scattering, the coherent scattering under conditions of 90 degrees- and 180 degrees-switching of the magnetic hyperfine field direction is considered. The results of the first experimental studies are discussed.