Abstract
Two spectroscopic methods using nuclear resonant scattering by synchrotron radiation, Synchrotron Mössbauer Spectroscopy and Nuclear Resonant Vibrational Spectroscopy(NRVS), have been intensively developed and utilized in recent years. Synchrotron Mössbauer Spectroscopy is suited for the research of the samples under extreme conditions such as at high pressure and at high temperature, because synchrotron radiation offers the small and highly collimated beam. It is also good for the surface and interface study of the thin film by the same reason. NRVS has been used to get the information of the phonon partial density of states of the specific isotopes, especialy for the research of the active center of the enzyme.