An yttrium Mξ source for ESCA

Abstract A new source for producing YMξ radiation in an ESCA spectrometer is described. The system makes use of continuous evaporation of yttrium on a rotating anode. It is demonstrated that this scheme allows YMξ-excited electron spectra to be recorded without gradual loss of resolution and intensity due to anode oxidation. Electron spectra of Ar, Hg and N 2 excited by YMξ radiation are studied. Relative photoelectric cross-sections of the 5d 5 2 , 5d 5 2 and 6s orbitals in Hg and the four valence orbitals in N 2 are measured. The valence electron shake-up spectrum of N 2 is discussed.