State-to-state reaction dynamics of HF(v = 2) with Ba and Sr

Abstract
HF gas molecules in v = 2 are produced in a beam‐gas reaction system using an intracavity, multiply resonant HF chemical laser to consecutively pump HF(v = 0) using the P1 (4) and P2 (3) HF lasing lines. A beam of Ba or Sr reacts with the perturbed reagent gas to form the metal monohalide. The internal state distribution of the MF product is probed using pulsed laser induced fluorescence. In both reactions, products are seen with internal energies out to nearly the exothermic limit, but fractional vibrational energy releases are small and apparently decrease with increasing reagent vibration. State‐to‐state cross sections for v = 2 reagents, relative to those for v = 1 and v = 0 are reported.