Experimental isotope shifts of the 5 ${}^2{S}_{1/2}$ state and low-lying excited states of Rb

L. Aldridge, P. L. Gould, E. E. Eyler

By combining a recent precise measurement of the ionization energy of ${}^{87}$Rb with previous measurements of electronic and hyperfine structure, an accurate value for the $^{85}\t…