Highly excited and autoionizing states in the spectrum of triply ionized titanium Ti(IV)

The spectrum of Ti(IV) excited in a vacuum spark was investigated in the range 250–900 Å with high resolution. Eighty-four lines were measured and identified as transitions from the 3p6ns, 3p6np, and 3p6nf configurations, where n ≤ 8, ≤ 10, and ≤ 8, respectively, and from the 3p53d2 and 3p53d4s configurations. The lines due to the transitions from the autoionizing levels of the 3p53d2 and 3p53d4s configurations were also observed and their widths were measured. The experimental data were compared with the results obtained by calculations using the Hartree-Fock method and semiempirical calculations.