Analysis of the Spectrum of Four-Times-Ionized Uranium (U5)

Wavelengths for 261 lines of four-times-ionized uranium between 443 Å and 2325 Å are reported. They are classified by 74 energy levels, most of which are attributed to the 6 p 6 5 f 2 , 6 p 6 5 f 6 d , 6 p 6 5 f 7 s , 6 p 6 6 d 2 , 6 p 6 5 f 7 p and 6 p 5 5 f 3 configurations. Energy parameters are derived for the two-electron configurations.