Development of Liquid‐Metal‐Ion Sources for Focused‐Ion‐Beam Applications

The luminescence of Y{sub 2}O{sub 3}:Gd under x-ray excitation is reported. Emission is observed from several manifolds. In some cases it is possible to distinguish between emission from Gd{sup 3 +} on the C{sub 2} site and emission from Gd{sup 3 +} on the S{sub 6} site.