Hyperfine-structure measurements in the RydbergSandPstates of rubidium and cesium

Abstract
We have measured the hyperfine structure in many highly-excited S and P states of Rb87 and Cs133. The results for the magnetic-dipole coupling constants are, in MHz, for Rb87: A(10S122)=56.3(2), A(11S122)=37.4(3); and for Cs133: A(9S122)=110.1(5), A(13S122)=18.4(1), A(14S122)=13.4(1), A(15S122)=10.1(1), A(16S122)=7.73(5), A(17S122)=6.06(10), A(10P122)=13.9(2).