DENSITY OF UNOCCUPIED STATES IN SOME OF THE 3D ELEMENTS FROM APPEARANCE-POTENTIAL SPECTRA

A deconvolution method has,been used to derive the densities of unoccu pied states in Ti, Cr, Fe, Ni from the experimental soft X-ray appeara nce potential spectra of their 2p(3/2) core levels. The higher 4s stat es exhibit a bandlike character in the APS derived density of states ( DoS). The data processing is based on a least-squares method using spl ine function formalism. Although APS essentially probes a localized Do S there is good agreement with single-particle band structure calculat ions.