Khouilid, M
Cherkani-Hassani, S.
Rachafi, S.
Teng, H
Defrance, Pierre
[UCL]
Absolute cross sections for electron-impact single ionization of krypton ions Krq+ (q = 12-18) have been measured. The animated crossed-beam method has been applied. The measurements cover the energy range from threshold to about 5.5 keV. The presence of ions formed in metastable states is observed for Kr18+, Kr16+ and Kr14+. Inner-shell excitation from the 2s, 2p, 3s and 3p subshells followed by autoionization is seen to play a dominant role for this reaction over the whole energy range. The importance of these excitation-autoionization processes explains the large underestimation of cross sections from the available theoretical and semi-empirical estimations which include direct processes only.
Bibliographic reference |
Khouilid, M ; Cherkani-Hassani, S. ; Rachafi, S. ; Teng, H ; Defrance, Pierre. Electron-impact single ionization of krypton ions (q=12-18). In: Journal of Physics B: Atomic, Molecular and Optical Physics, Vol. 34, no. 9, p. 1727-1744 (2001) |
Permanent URL |
http://hdl.handle.net/2078.1/42715 |