Intermediate X-ray Sources for ESCA

Abstract
The applicability of the YMζ (hv = 132 eV) and the FKα (hv = 676 eV) X-ray lines for generating photoelectron spectra is demonstrated. The N2 valence electron spectra excited by YMζ and A1Kα are studied in regard to relative intensities and shake-up structure. Relative intensities of electron levels in Au excited by FKα and A1Kα are measured. Cross-section ratios for FKα and A1Kα excited spin-orbit components in Ar and Au are determined. Experimental and theoretical cross-section ratios of the Hg 5d spin-orbit components are reviewed for excitation energies between 21 eV and 2 700 eV.