Energy Levels of Neutral Francium ( Fr I )

Configuration   Term   J     Level(cm-1) Ref.


7s              2S     1/2       0.000   ABDJ90
 
7p              2P°    1/2   12237.409   ABDJ90
7p              2P°    3/2   13923.998   ABDJ90
 
8p              2P°    1/2   23112.960   ABDJ90
8p              2P°    3/2   23658.306   ABDJ90
 
Fr II (1S0)     Limit        32848.872   ABDJ90