Analysis of the (5d(3)+5d(2)6s)-5d(2)6p Transitions of IrVII

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.