TIME-SLICED MOSSBAUER ABSORPTION-SPECTROSCOPY USING SYNCHROTRON-RADIATION AND A RESONANT BRAGG MONOCHROMATOR

Doppler absorption measurements have been used to investigate time-sli ce Mossbauer absorption spectroscopy for synchrotron radiation and a m osaic resonant Bragg monochromator. The energy widths for wide time in tervals and the time-dependent narrowing of the spectral width of reso nant Bragg scattering from a mosaic (Fe2O3)-Fe-57 crystal have been me asured using a powdered 9.7 mg/cm(2) (Fe2O3)-Fe-57 absorber. The measu rements are compared with calculations for a thick (9.7 mg/cm(2)) and a thin (0.5 mg/cm(2)) absorber, and the feasibility of high angular co llimation neV range x-ray scattering spectroscopy using synchrotron ra diation and time windowing is assessed.