Isotope Shifts in the 7 s → 8 s Transition of Francium: Measurements and Comparison to ab initio Theory
Physical Review A
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).
Kalita, M. R.; Behr, J. A.; ...; Aubin, Seth; and al., et, Isotope Shifts in the 7 s → 8 s Transition of Francium: Measurements and Comparison to ab initio Theory (2018). Physical Review A, 97(4).
This work is made available for educational and personal use only. Copyright is credited to the authors. Any other uses should be directed to the publisher.