Optical laser spectroscopy and hyperfine structure investigation of the 102S, 112S, 82D, and 92D excited levels in francium
- 28 October 1990
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic, Molecular and Optical Physics
- Vol. 23 (20) , 3511-3520
- https://doi.org/10.1088/0953-4075/23/20/014
Abstract
The authors present an extension to low-lying states of francium (10s, 11s, 8d, 9d) of a previously published high-resolution experiment performed on the ns and nd Rydberg levels. These four levels were investigated at CERN with the on-line mass separator ISOLDE using stepwise laser excitation in collinear geometry. Accurate energy measurements lead to a more reliable determination of the quantum defects of the whole ns and nd series, together with the ionization potential for 212Fr (nuclear spin I=5) which is found to be 32848.872 (9) cm-1. The measurement of the fine structure splittings for the nd 2D3/2, 5/2 doublets was completed at the same time. The main result of the study is the first observation and measurement of hyperfine structures in 2S and 2D states.Keywords
This publication has 26 references indexed in Scilit:
- High-resolution laser spectroscopy of Fr ns and nd Rydberg levelsJournal of Physics B: Atomic, Molecular and Optical Physics, 1989
- Laser resonance photoionization spectroscopy of Rydberg levels in FrPhysical Review Letters, 1987
- First Observation of the Blue Optical Lines of FranciumEurophysics Letters, 1987
- Accurate wavenumbers of the first resonance doublet of francium atoms and relativistic contribution to isotope shifts in the resonance doublets of francium and caesium atomsJournal of Physics B: Atomic and Molecular Physics, 1986
- Hyperfine structures and isotope shifts of ; Possible evidence of octupolar deformationPhysics Letters B, 1985
- New targets for on-line mass separation of nuclei formed in 600 MeV proton and 910 MeV 3He reactionsNuclear Instruments and Methods in Physics Research, 1981
- High-temperature carbide targets for fast on-line mass separation of alkali and noble gas elementsNuclear Instruments and Methods, 1979
- Collinear Laser Spectroscopy on Fast Atomic BeamsPhysical Review Letters, 1978
- Experimental determinations of the hyperfine structure in the alkali atomsReviews of Modern Physics, 1977
- Relativistic treatment of outer electron orbitalsInternational Journal of Quantum Chemistry, 1972