Abstract

Collisions that produce a change in the total angular-momentum and quenching processes involving the triplet Z3F0 titanium excited level and diatomic molecules have been studied by laser perturbation and time-resolved spectroscopy. The thermally averaged total angular-momentum changing cross sections (z3Fi0→z3Fj0) in units of 10−16cm2 are: σ¯42=3.2±1, 1.4±0.5; σ¯43=13.3±2, 6.8±1; σ¯32 =19.0±2, 7.2±1 , respectively, for nitrogen and hydrogen colliding partners.Large quenching cross sections are obtained, as σ−QN2=53±7, and σ−QH2=38±4 in units of 10^-16 cm². These results are discussed in relation with previous measurements dealing with titanium-noble-gas collisions, and with available published results.