The Spectrum of Five-times-ionized Chromium, Cr VI

The spectrum of five-times-ionized chromium has been observed by using a 5-m grazing-incidence spectrograph and a 3-m normal-incidence spectrograph. The light sources have been a vacuum sliding spark and an open vacuum spark. 95 lines have been classified in the region 144 to 2 496 Å. These transitions have fixed the terms of the series built on the 3 p 61 S 0 limit up to 6 s , 6 p , 5 d , 10 f , 6 g , and 7 h as well as 10 levels of 3 p 5 3 d 12 and 15 levels of 3 p 5 3 d 4 s . The ionization energy is 731 020±6cm -1 (69.633 eV).