R. P. Bauman

Investigation of complex ionization amplitudes in cadmium by ([ital e],2[ital e]) spectroscopy

High-resolution ([ital e],2[ital e]) energy spectra are presented which enable the isolation of interference effects between [ital J]=0,1,2 multipoles in electron-impact ionization of cadmium. It is found that both resonant and nonresonant processes are important. Relative magnitudes and phases of ionization amplitudes are obtained which disagree with plane-wave Born approximation calculations.

(e,2e) angular distributions and energy spectra in cadmium

Existing e, 2e angular distribution measurements and e, 2e energy spectra in atomic cadmium are reviewed and a major difference in the analyses of the two data sets is highlighted. It is shown that an autoionizing level, previously postulated to explain the angular distribution data, does not exist, and is an artefact of the simplifying assumptions used in the original analysis. A new calculation is presented which unifies the interpretation of the measured angular distributions and the energy spectra.

Photoelectron spectra in cadmium: comparison with theory and (e,2e) spectra

Experimental photoelectron data in Cd for the 4d95s25p autoionizing region are compared with calculations and high resolution (e,2e) spectroscopic data. Doubly excited autoionizing states are found to influence the spectral profile and are observed in both photoelectron and (e,2e) spectra.