The Ar L2,s M M Auger spectrum has been recorded. A great number of satellite lines are found many of which can be assigned to Auger transitions in doubly ionized argon. Several shake-up satellites are also found in the spectrum. The relative intensities of the spectral lines are given and the intensities are compared with previous experiments and calculations.

Isotopic shift data for Hei induced high resolution valence electron spectra of H2 16O, H2 18O, and D2 16O are presented. From the differences in the vibrational subspectra we were able to deduce adiabatic ionization energies and geometries of the ions and to assign the excited vibrations to normal modes. The ν2 progression in the 2A1 band was found to be affected by strong vibronic coupling.

The Jahn-Teller effe>ct it2 the electron spectrum of methane.

The high resolution Auger spectra from krypton (L2,3 MM and M4,5 NN) and xenon (M4,5 NN and N4,5 OO) have been obtained. The Auger lines are assigned by comparison with energies obtained from optical spectroscopy and relativistic Hartree-Fock-Stater calculations and the energies of new atomic levels have been found. Some of the satellite lines have been assigned to shake-up processes. Comparison with calculations of Auger intensities has also been made.

The electron spectra of the A12←1A1 and the E←12A1 transitions of ammonia have been measured with sufficient resolution to observe considerable fine structure. The first transition, A12←1A1, contains two vibrational progressions which are assigned to the ν2 bending mode. The second transition E←12A1, consists of two overlapping electron bands due to Jahn-Teller splitting of the 2E state. The vibronic structure accompanying this transition has been partially resolved and compared to the results of model calculations.