AUGER AND PHOTOELECTRON-SPECTRA OF K+ IN SOLIDS AT RESONANT 2P6 TO 2P53D EXCITATION

We present here the 2p-3d-resonant photoelectron and Auger spectra of K+ in KMnF3 and compare them with analogous spectra of KCl. The spectra are very similar for both compounds. The most conspicious structure which arises during the LMM Auger spectator decay of the 2p(5)3d configuration is due to the 3p(-2)3d final configuration. Its remarkable property, the linear dispersion in the whole resonance region, demonstrates that i) the Auger transition is so fast that at resonant excitation it is not possible separate it from the photon absorption process, ii) the L2L3M45 Coster-Kroni transition is an important link in the nonradiative decay of the resonantly-created L2 hole, and iii) the crystal-field splitting of the intermediate 2p(5)3d configuration does not determine the general mechanism of nonradiative decay of this configuration.