Interpretation of the quasicontinuum band emitted by highly ionized rare-earth elements in the 70100- range

P. Mandelbaum*, M. Finkenthal, J. L. Schwob, M. Klapisch

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

90 Scopus citations

Abstract

Narrow (<5), intense quasicontinuum bands, appearing in emission spectra of highly ionized rare-earth elements between 70 and 100, previously observed in tokamaks and laser-produced plasmas, have been obtained from a low-inductance vacuum spark. The bands shift toward shorter wavelengths with increasing atomic number Z. Using the unresolved transition array model, these bands are identified as primarily 4d-4f transitions in Rh i to Rb I like ions, although the widths come out too large and the mean wavelengths are much too dependent on ionization stages. Detailed ab initio computations show that the interactions between the 4p64dN-14f and 4p54dN+1 configurations are responsible for the narrowing and the superposition of the transition arrays for the different ionization stages of a given element, in agreement with experimental data.

Original languageEnglish
Pages (from-to)5051-5059
Number of pages9
JournalPhysical Review A
Volume35
Issue number12
DOIs
StatePublished - 1987

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