The spectrum of tellurium was recorded in the 300^1230 Ð region on a 3-m normal incidence spectrograph using a triggered spark source. The new data lead to the revision and extension of the earlier work in Te V spectrum. Out to the 36 earlier published levels, the values of 26 levels have been con-¢rmed and ten levels have been rejected. Twenty additional levels have been identi¢ed, almost all of them are belonging to the doubly excited 5p6s and 5p5d con¢gurations. Hartree^Fock (HF) and least-square-¢tting (LSF) parametric calculations were carried out to interpret the spectrum. One hundred and sixty (160) lines have been classi¢ed.

The spectrum of tellurium was photographed on a 3 m normal incidence spectrograph in the 300-2100 Å wavelength region using a triggered spark source. Three configurations, namely 5p3, 5s5p5d and 5s5p6s, of trebly ionized tellurium (Te IV), all involving two-electron excitations, were investigated. Seven out of ten levels reported previously were confirmed, some with a change of configuration assignment, the J-value of one level was changed from (3/2) to (5/2) and two levels were rejected. The new observations have resulted in establishing 35 out of 36 energy levels belonging to these three configurations. Least-squares fitted and Hartree-Fock calculations involving multi-configuration interactions were carried out to interpret the observed spectrum. 155 new lines have been classified in the Te IV spectrum.