The influence of core excitations on energies and oscillator strengths of iron group elements
- 14 April 1995
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic, Molecular and Optical Physics
- Vol. 28 (7) , L213-L220
- https://doi.org/10.1088/0953-4075/28/7/003
Abstract
We show that for configurations of the type 3pM3dN the influence of core excitations, in particular the excitation 3p2 to 3d2, is important both for energies and oscillator strengths. The latter is particularly true for transitions of the type 3p63dN to 3p53dN+1 due to the fact that the core excitation in the ground configuration leads to a configuration which has an allowed dipole transition to the excited state. Differences and similarities between 3p53dN and the more extensively studied 3p63dN configurations are pointed out and illustrated with several examples concerning highly charged ions. The conclusion is that, while core excitations are important for the description of transitions out of the open 3d shell, they are absolutely essential for transitions out of the closed 3p shell, gf values are given for astrophysically important transitions in Ni X.Keywords
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