Results

Performance on a sputter cleaned Silver standard:
>10000cps at 1.4eV FWHM
>1000 cps at <0.9eV FWHM

Figure 2:Gold survey spectrum excited by Ag-mono

Gold foil (cleaned, survey spectrum: Fig. 2).Au 4f 7/2 @1.3eV FWHM 4,500cps (Edgell et al 25cps)

Greater analysis depth
The Al 2p spectra shown (Figure 3) were acquired with (a) Al and (b) Ag sources. Spectrum (b) is a clear illustration of the greater analysis depth of the Ag source as the element : oxide ratio is greater than that acquired with the Al source. An oxide thickness of 1.8nm indicated here was confirmed by independent angle resolved measurements.

Figure 3: Al 2p regions:Al mono (a), and Ag mono (b) sources