RESONANT PHOTOEMISSION OF TITANIUM

The partial photoionization cross section of the titanium 3d band has been measured using synchrotron radiation in a wide photon energy rang e (21-110 eV). Our prime interest has been concentrated on the resonan t behaviour of the valence band in the vicinity of the 3p and 3s thres holds in which the influence of autoionization appears as drastic fluc tuations of a resonant profile. The resonance close to the 3s excitati on edge has been interpreted to be primarily caused by the p-character of the unoccupied band and the Cooper minimum of the 3p core level. W e have also considered in details the effects which may distort a meas ured profile. In addition, we have examined the subthreshold Auger emi ssion that should already occur below the edge energy. However, our st udy does not support the existence of the subthreshold Auger phenomeno n in titanium.