Measurements of f-numbers for α- and γ-bands of TiO

A pressure-driven shock tube has been used to measure electronic f-numbers for bands (three each) belonging to the α- and γ-band systems of titanium oxide. Observations were made at wavelengths of 6734 Å, 7147 Å, and 7689 Å in the γ-bands, and at 4969 Å, 5183 Å, and 5460 Å in the γ-bands. Observed variations in the f-numbers for a given electronic band system may perhaps be attributed to the interaction between vibrational and electronic motion.