The analysis of the 5s25p2, 5s5p3, 5s25p5d, and 5s25p6s configurations of Te III

The spectrum of tellurium was photographed in the wavelength region 400–2000 Å (1 Å = 10−10 m) on a 3 m normal incidence spectrograph. The new measurements and configuration interaction calculations lead to major revisions in the earlier analysis of Te III. For the ground state 5s25p2, all but one of the previously known levels have been confirmed. Out of the 26 levels belonging to the three excited configurations, viz. 5s5p3, 5s25p5d, and 5s25p6s, 14 levels have been confirmed, 4 have been rejected, and for 8 of the levels, either the designation, J value or configuration assignments have been revised. Configuration interaction calculations were carried out to interpret the observed spectrum. Seventy-two lines have been classified in the 5s25p2 − (5s5p3 + 5s25p5d + 5s25p6s) transition array.