ELASTIC AND INELASTIC-SCATTERING OF 4D INNER-SHELL ELECTRONS IN (Y,GD)(2)O-3 STUDIED BY SYNCHROTRON-RADIATION EXCITATION

Excitations within the 4f shell of Gd3+ in (Y,Gd)(2)O-3 are observed b y resonant elastic and inelastic soft x-ray scattering with synchrotro n radiation. Inelastic scattering takes place when exciting 4d(10)4f(7 )-->4d(9)4f(8) transitions and extends over an energy range of about 1 0 eV. The features can be assigned to the net transition from the S-8( 7/2) ground state to the sextet multiplets of the 4f(7) configuration in Gd3+, which have the same parity as the ground state. The inelastic scattering is maximal when the excitation energy is tuned to the 4d(9 )4f(8)(D-6) intermediate state.