ANALYSIS OF THE SPECTRUM OF THE (5D(4)-5D(3)6P SYSTEM OF 4 TIMES IONIZED OSMIUM (OS-V)(5D(3)6S))

The spectrum of osmium was photographed in the 225-2100 Angstrom regio n on a 3m normal incidence spectrograph using a triggered spark light source. The (5d(4) + 5d(3)6s)-5d(3)6p transition arrays of Os V were i nvestigated and 703 lines have been classified. The analysis of the sp ectrum of Os V has resulted in the determination of 57 levels in the ( 5d(4) + 5d(3)6s) even system and of 89 levels in the 5d(3)6p odd level system. The energy levels and their eigenvector compositions have bee n described by means of the orthogonal operator technique. Three parti cle electrostatic effects of the ddp-type have been established for th e first time in the 5d-elements. Accurate gA-values calculated by mean s of orthogonal operators are presented also.