L-ALPHA X-RAY-EMISSION SPECTRA OF COPPER-COMPOUNDS AND ALLOYS

With a two-crystal vacuum spectrometer equipped with beryl crystals, the Cu Lalpha emission spectra in fluorescence have been measured for selected copper compounds Cu2O, CuO, CuCl, CuBr, Cul, CuF2, CuCl2, CuBr2, CuF2.2H2O, CuCl2.2H2O and Cu3P, and alloys alpha-Cu+35%Zn and Cu+2%Be. The measured spectra are grouped into three classes. The first class comprises the spectra of alloys, which consist of a single broad band similar to that of Cu metal. The second class includes the spectra of monovalent copper compounds, which are composed of a prominent peak and its high- and low-energy structures. To the third class belong the spectra of divalent copper compounds, which consist of a strong peak accompanied with a characteristic dip and hump on the high-energy side. The Cu Lalpha emission bands of Cu2O, CuCl and CuBr are compared with available XPS spectra and theoretical Cu-3d-DOS.