Spectra and energy levels of the galliumlike ions Rb VII-Mo XII

Spectra of the galliumlike ions Rb VII, Sr VIII, Y IX, Zr X, Nb XI, and Mo XII emitted from sparks and laser-produced plasmas have been recorded in the region 235-665 A. All levels of 4s24p, 4s24d, 4s4p2, 4p3 and, in Rb VII, Sr VIII and Y IX, 4s24f have been established. The level structure has been studied by means of ab initio and parametric calculations. (orig.)