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Isotope Shifts in the 7 s → 8 s Transition of Francium: Measurements and Comparison to ab initio Theory
Kalita, M. R. Behr, J. A. Aubin, Seth
Kalita, M. R.
Behr, J. A.
Aubin, Seth
Abstract
We observe the electric-dipole forbidden 7s→8s transition in the francium isotopes 208−211Fr and 213Fr using a two-photon excitation scheme. We collect the atoms online from an accelerator and confine them in a magneto-optical trap for the measurements. In combination with previous measurements of the 7s→7p1/2 transition we perform a King plot analysis. We compare the thus-determined ratio of the field shift constants (1.228 ± 0.019) to results obtained from new ab initio calculations (1.234 ± 0.010).
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2018-04-01
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PhysRevA.97.042507.pdf
Adobe PDF, 348.74 KB
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Physics
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https://doi.org/10.1103/PhysRevA.97.042507