Non-linear spectral splitting of Rydberg sodium in external fields*
Gao Weia), Yang Hai-Fenga), Cheng Honga), Zhang Shan-Shana), Liu Dan-Fengb), Liu Hong-Pinga)†
Fig. 1. The experimental observations of the #cod#x003C3; a and #cod#x003C0; c transitions of sodium and their corresponding theoretical calculations b and d. An anti-crossing is observed for the #cod#x003C0; spectrum while the #cod#x003C3; one shows a simple linear Stark effect.