PAC identification of electric-nuclear-quadrupole interactions in Sm-sesquioxides

Abstract

We present Perturbed Angular Correlation (PAC) results of the electric-nuclear quadrupole interaction at <SUP>181</SUP>Ta located at the nonequivalent cation sites of cubic C-Sm<SUB>2</SUB>O<SUB>3</SUB> and monoclinic B-Sm<SUB>2</SUB>O<SUB>3</SUB> free of defects. The application of the empirical Cd/Ta correlation found in binary oxides allowed us to correlate the interactions with each site and to identify the single Sm site populated in <SUP>111</SUP>In-implanted B-Sm<SUB>2</SUB>O<SUB>3</SUB> experiments. The preferential site occupation of Cd and Ta in B-Samaria is discussed in terms of the "chemistry" of the probe-atoms.