A CARS investigation of HBr and H2 collisions with hot H atoms produced by ArF laser photolysis of HBr

Coherent anti-Stokes Raman spectroscopy is used to examine the rotational and vibrational state distributions in HBr and H2 molecules excited by collisions with translationally hot H atoms produced by ArF laser photolysis of HBr. CARS detection of Br atoms and of rovibrationally excited H2 produced by the H+HBr reaction is demonstrated for the first time.