Electronic Quenching Of OH A2Σ+ Radicals In Collisions With Molecular Hydrogen
Chemical Physics Letters
Collisional quenching of electronically excited OH A2Σ+ radicals by molecular hydrogen introduces nonradiative pathways that rapidly remove OH population from the excited state, and result in a significantly decreased fluorescence lifetime. One of these pathways is shown to lead to ground state OH X2Π products with ∼1 eV of internal excitation in both highly excited rotational levels of v = 1 and the lowest rotational levels of v = 2. This highly nonstatistical OH X2Π product distribution reflects the passage of the HO–H2system through the conical intersection regions that couple the ground and excited state surfaces.
I. B. Pollack, Y. Lei, Thomas Alex Stephenson, and M. I. Lester.
"Electronic Quenching Of OH A2Σ+ Radicals In Collisions With Molecular Hydrogen".
Chemical Physics Letters.