ANALYSIS OF THE 4D(7) AND 4D(6)5P CONFIGURATION OF THE 9TH SPECTRUM OF ANTIMONY - SB IX

The spectrum of antimony was photographed in the 120 angstrom-270 angs trom on a 3-m grazing incidence spectrograph at the Moscow laboratory and 10.7 m grazing incidence spectrograph at the NIST laboratory in Wa shington. A triggered spark source was used in both laboratories to ex cite the Sb IX spectrum. Seventeen of 19 levels of the 4d7 configurati on and 132 of 180 levels in the 4d(6)5p configuration of the Sb IX hav e been established. Two hundred and seventy three lines have been clas sified as the 4d7-4d(6)5p transitions in the 167 angstrom-202 angstrom region. Least-squares-fitting calculations were carried out which int erpret the spectrum quite adequately.