Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...271..679p&link_type=abstract
Astronomy and Astrophysics, Vol. 271, p. 679 (1993)
Astronomy and Astrophysics
Astrophysics
Atomic Data, Atomic Processes
Scientific paper
The shake-up process following 1s photoionization is considered along the Be isoelectronic sequence. For atomic beryllium strong shake up excitations have been observed experimentally. Both 2s→2p excitation which is induced by the ejected electron, and 2s→3s excitation which is mostly due to configuration interaction, decrease rapidly with the atomic charge. C, N, O and Ne Be-like ions exhibit non-negligible shake up excitations. This gives rise to Kα lines from the 1s2s2p or 1s2p2 states.
de Araújo Francisco Xavier
Petrini D.
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