Standard XPS is typically performed using a monochromated Al k-alpha source, giving the best signal and resolution available.

Standard XPS

Monochromated Al X-rays (1486.69 eV) combined with high resolution detectors provide widespread access to high quality XPS analysis.

High Energy XPS

Monochromatic Ag La X-rays (2,984.31 eV) permits deeper investigation compared with Al X-rays, at the expense of overall signal.