Hello all,
I recently collected two maps of an Ni-base superalloy using EDS (Pathfinder) and WDS. I used identical settings; 12 kV, 50 nA, 0.5 sec dwell time, 0.24 um pixel size and 256x192 pixels.
As expected, WDS was superior with the trace and light elements.
However, WDS also had better spatial resolution for the heavy elements (Cr, Fe, Ni) than the EDS map. Why might this be? Is it due to the better signal to noise ratio of WDS over EDS?
Thanks,
Michael