Affiliation:
1. Laboratoire Aimé Cotton, CNRS, Université Paris-Sud, 91405-Orsay, France.
Abstract
Theoretical studies of electronic configurations of several lanthanide ions in the Racah–Slater approach were performed with the standard suite of codes by R.D. Cowan, including a fitting of energy parameters. Configuration interaction was considered explicitly in the low configurations and was processed by effective parameters for doubly-excited far configurations. Mean errors lower than 100 cm–1were obtained. Systematic differences are noticed between radial integrals calculated by ab initio PHFRand the Pfitfitted values. The consistency of the scaling factors SF(P) = Pfit/PHFRand of the effective parameters for far configuration effects is shown. In an application to Tm II, the predicted transition probabilities compared well with line intensities and led to the finding of new energy levels. In Nd II, the configuration 4f5is identified.
Publisher
Canadian Science Publishing
Subject
General Physics and Astronomy
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