6533b853fe1ef96bd12acc37
RESEARCH PRODUCT
First observation of the blue optical lines of francium
S. LibermanA. C. MuellerRainer NeugartKlaus WendtH T DuongC. ThibaultErnst W. OttenJ.l. VialleH. H. StrokeH. H. StrokeF. TouchardB. PeuseP. JuncarJ. Pinardsubject
PhysicsIsotopeGeneral Physics and AstronomyResonancechemistry.chemical_element[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]Alkali metal01 natural sciences7. Clean energy010305 fluids & plasmasFranciumchemistry0103 physical sciencesWavenumberAtomic physics010306 general physicsSpectroscopyHyperfine structureLine (formation)description
We report here the first wave-length measurements in the second resonance doublet of francium, D1'(7s2S1/2-8p2P 1/2) and D2'(7s2S1/2-8p2P 3/2), carried out by collinear fast-beam laser spectroscopy. The transition wave numbers are D1' = 23112.9603(50) cm-1 and D2' = 23658.3058(40) cm-1, corresponding to a 8p fine-structure splitting of δW8p = 545.3454(70) cm-1. In addition the hyperfine structure in both lines and the isotope shift in the D2' line for the isotopes 212,213,220,221Fr have been measured. The results are discussed with special emphasis on the analysis of the atomic structure in the heaviest alkali element and compared with theoretical predictions, as well as the only earlier spectroscopic data on francium obtained in the first resonance doublet.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1987-01-15 |