The Oscillator Strengths of the C[TINF]2[/TINF] Phillips System

Radiative lifetimes of the C 2 A 1 II u - X 1 Σ + g (Phillips) system have been remeasured using the High-Frequency Deflection technique. Using catalyzer gases, it is shown that collisional transfer effects are present which tend to lengthen the registered lifetimes, yielding too low f -values. The remeasured value f A − X 2,0 = (1.36 ± 0.15) × 10 -3 is 45%-75% larger than earlier laboratory experiments and agrees within the error limits with recent results obtained from spectra of ζ Oph as well as ab initio calculations.