A backscattering Mbssbauer spectrometer is presented. This system consists of a multi- wire proportional chamber and a multi- channel data acquisition and processing system which includes a multi- channel preamplifier

a digital single- channel analyser

a multi- data acquisition unit

a control microcomputer and a T.V. display. This spectrometer has the advantages of high geometrical efficiency

in- situ data collecting and processing

and simultaneous acquisition of informations from several different depths or directions.