Int. Wavelength Aki Energy Configuration Term J Line Aki (Å) (108s-1) Levels (cm-1) Ref. Ref. 800 2162.25 0.0 6p5 2P° 3/2 M64a 46233.6 ? 6p4(3P)7s 4P 3/2 1000 2244.01 0.0 6p5 2P° 3/2 M64a 44549.3 ? 6p4(3P)7s 4P 5/2