An yttrium M zeta source for ESCA

A new source for producing YMzeta 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 YMzeta-excited electron spectra to be recorded without gradual loss of resolution and intensity due to anode oxidation. Electron spectra of Ar, Hg and N2 excited by YMzeta radiation are studied. Relative photoelectric cross-sections of the 5dsub(5/2), 5dsub(3/2) and 6s orbitals in Hg and the four valence orbitals in N2 are measured. The valence electron shake-up spectrum of N2 is discussed. (Auth.)