A new high luminosity UHV orange type magnetic spectrometer used for depth selective Mössbauer spectroscopy

A new magnetic spectrometer of the orange type has been built for energies up to 45 keV. Its features are: ·?Transmission: 20% of 4π ·?Relative momentum resolution: 0.1 to 1%, ·?Energy band width: ΔE/E = ± 4% For Auger Electron Spectroscopy (AES) a combination with an electrostatic retardation field around the sample will provide an even higher resolution. For depth selective conversion electron Mössbauer spectroscopy (DCEMS) the exceptional high effective luminosity of the ultrahigh vacuum (UHV) orange spectrometer allows the analysis of non-enriched samples in reasonable time without loss in depth resolution. The UHV was realized by a differentially evacuated double chamber system made of an aluminium alloy using Viton gaskets. The inner part can be heated to 150°?C.