We briefly present in this paper the results of 1200eV non-coplanar symmetric (e, 2e) binding energy spectrum of argon and an electron momentum profile of argon 3p.They were measured by a newly constructed spectrometer with position-sensitive detectors in USTC. We use non-birming mode to get the Ar3p、 3s and 3s satellites binding energy spectra separately. The experAnental results is well consistent with the available theoretical results.
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