Mössbauer spectroscopy

Two Mössbauer instruments for ⁵⁷Fe Mössbauer spectroscopy are available which each consist of a WissEl Mössbauer spectrometer (MRG-500), a ⁵⁷Co/Rh radiation source and an MBBC-HE0106 MÖSSBAUER He/N₂ cryostat for experiments between 5 and 300 K. Isomer shifts are determined relative to a-iron at 298 K. WinNormos for Igor Pro software is used for the quantitative evaluation of the spectral parameters (least-squares fitting to Lorentzian peaks). The minimum experimental line widths are 0.20 mms^-1.