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Abstract

The R-matrix method for electron impact ionisation was used to calculate the total and single differential ionisation cross sections for neutral chromium at 100 eV incident energy. For energies above the threshold for the production of the Cr(+)(3d(4)4s)6D final ionic state, this state is populated significantly more than the final state Cr(+)(3d(5))6S. However, a wealth of autoionising resonances enhances the cross section for the production of the 6S ionic state below the 6D threshold. A list of these resonances is given, together with a classification scheme based on quantum defect theory.

Additional information

Authors: BARTSCHAT K, Drake University, Department of Physics and Astronomy, Des Moines (US);REID R H G, The Queen's University of Belfast, School of Mathematics and Physics, Belfast, Northern Ireland (GB);BURKE P G, The Queen's University of Belfast, School of Mathematics and Physics, Belfast, Northern Ireland (GB);SUMMERS H P, JET Joint Undertaking, Abingdon, Oxon. (GB)
Bibliographic Reference: Report: JET-P(90)48 EN (1990) 10 pp.
Availability: Available from the Publications Officer, JET Joint Undertaking, Abingdon, Oxon. OX14 3EA (GB)
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