Research Papers in Physics and Astronomy


Date of this Version

January 1998


Published in Photonic, Electronic and Atomic Collisions: Invited Papers of the Twentieth International Conference on The Physics of Electronic and Atomic Collisions, Vienna, Austria, July 23–29, 1997. Edited by Friedrich Aumayr and Hannspeter Winter. Singapore, New Jersey, London, Hong Kong: World Scientific, 1998). Copyright © World Scientific Publishing Co. Pte. Ltd. Used by permission.


Eigenchannel R-matrix calculations for photodetachment partial cross sections of H, Li, Na, and Aℓ provide results that are dominated by high doubly-excited states and that are in excellent agreement with available measurements. Propensity rules for doubly-excited states developed for H apply also for heavier targets. However, states not observed in H may be observed in the heavier target spectra owing to the non-Coulomb core. Finally the signature of particular doubly excited states changes drastically from one partial cross section to another.

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