Measurement of 1s2s3S1–1s2p3P2,0wavelengths in heliumlike silicon

Autor:	Daniel D. Dietrich, Edmund G. Myers, William A. Hallett, David J. H. Howie, Joshua D. Silver
Rok vydání:	1994
Předmět:	Physics Wavelength Silicon chemistry chemistry.chemical_element Interval (mathematics) Atomic physics Spectroscopy Atomic and Molecular Physics and Optics
Zdroj:	Physical Review A. 49:4390-4397
ISSN:	1094-1622 1050-2947
DOI:	10.1103/physreva.49.4390
Popis:	We have measured the vacuum-ultraviolet 1s2s $^{3}$${\mathit{S}}_{1--}$1s2p $^{3}$${\mathit{P}}_{2,0}$ transition wavelengths in heliumlike silicon by photographic spectroscopy of a beam-foil source. The results are 814.71\ifmmode\pm\else\textpm\fi{}0.02 \AA{} and 878.68\ifmmode\pm\else\textpm\fi{}0.03 \AA{}, respectively, and represent a sensitive test of present relativistic and quantum electrodynamic calculations. Comparisons are made between our results, previous measurements of these transitions, and the current theories. Good agreement is obtained, particularly with recent relativistic many-body perturbation calculations. A discussion of future measurements of this interval is also presented.
Databáze:	OpenAIRE
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