The spectra of iridium were photographed on 3-m and 6.65-m normal incidence
spectrographs in the region 300-2100 Angstrom using a triggered spark sour
ce. The (5d(3) + 5d(2)6s) - 5d(2)6p transitions were investigated. The conf
igurations 5d3 and 5d(2)6p had been previously studied which resulted in es
tablishing all 19 levels of the 5d(3) configuration and 44 out of 45 levels
of the 5d(2)6p configuration. In this analysis 15 out of 16 theoretically
possible levels of the 5d(2)6s configuration have been found which are base
d on 106 classified lines as being the transitions from the 5d(2)6p configu
ration. All previously found levels in Ir VII have been confirmed. One miss
ing level in the odd configuration has been established and 46 additional s
pectral lines have been identified as the 5d(3) - 5d(2)6p transitions in th
e ion.
Calculated energy values and LS-compositions, obtained from the fitted para
meter values using the orthogonal, operator approach: are given for all lev
els of the three configurations.