EMPTY STATES IN CUPROUS HALIDES STUDIED WITH BREMSSTRAHLUNG ISOCHROMAT SPECTROSCOPY

The conduction bands of cuprous halides are studied through bremsstrahlung-isochromat-spectroscopy (BIS) experiments. These results are compared with the densities of states calculated by the linear-muffin-tin-orbital (LMTO) method. The good agreement in the low-energy range permits us to determine the contributions of the different symmetries on the two sites of the three halides. On the higher-energy side BIS, as well as x-ray-absorption spectra, show that the LMTO gives better agreement when they are compared with the p states on copper in CuI than in CuCl.