High-pressure Mössbauer spectroscopy with nuclear forward scattering of synchrotron radiation

Using a diamond anvil cell, high-pressure 57 Fe Mössbauer spectroscopy has been performed with the nuclear forward scattering of synchrotron radiation. A pressure-induced magnetic hyperfine interaction at 57 Fe in SrFeO 2, 97 has been detected at 44 GPa and 300 K for a first time by a quantum-beat modulation of the decay rate after collective nuclear excitation by the synchrotron pulse. The basic concept and method used to detect nuclear forward scattering with synchrotron radiation are discussed.