Interference Effects in Argon Auger Coincidence Spectra
The occurrence and significance of interference effects1 observed in electron-impact (e,2e) coincidence measurements of Auger transitions2,3, has aroused considerable interest. We report the first detailed observations of the strong angular behaviour of the interference phenomena, and the quantified behaviour of the interference and post-collision-interaction (PCI) effects on the argon L2,3M2,3M2,3 Auger lines. Excess energies up to 18 eV above the L2,3 inner-shell ionization threshold were used. The interference is attributed to interaction between the outer-shell satellite-state ionization processes, identified in coincidence4, and the Auger processes.
KeywordsInterference Effect Excess Energy Auger Electron Ionization Threshold Continuum Background
Unable to display preview. Download preview PDF.
- 6.B. Lohmann, Aust J. Phys. 49:365 (1996), and references therein.Google Scholar
- 8.H. Ishii, Y. Iketaki, T Watabe, T. Takayanagi, K. Wakiya, H Suzuki and F. Koike, Phys Rev. A 43:134 (1991), and references therein.Google Scholar
- 10.D.K. Waterhouse, J.F. Williams and P.A. Smith, Rev. Sci. Instrum. 67:1769 (1996), and references therein.Google Scholar
- 11.G.B. Armen, Phys. Rev. A 37: 995 (1988).Google Scholar