Electron impact excitation of forbidden transitions Ca XV
- 28 June 1983
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic and Molecular Physics
- Vol. 16 (12) , 2231-2246
- https://doi.org/10.1088/0022-3700/16/12/018
Abstract
Using configuration interaction wavefunctions in the R-matrix program the collision strengths have been calculated in the L-S coupling scheme for electron impact excitation of 52 forbidden transitions in Ca XV among the states having configurations 1s22s22p2, 1s22s2p3 and 1s22p4. The calculations have been done in a wide energy range below 28.0 Ryd and the collision strengths are found to exhibit a complex pattern of resonance structure in the entire threshold energy region for almost all the transitions. All partial waves with L3-5*105K suitable for astrophysical applications and are believed to be accurate within 10%.Keywords
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