화학공학소재연구정보센터
Journal of Physical Chemistry A, Vol.106, No.39, 8992-8995, 2002
Rotational-level dependence of OH A(2)Sigma(+) quenching at 242 and 196 K
The rotational-level dependence of quenching of A(2)Sigma(+) OH has been studied below room temperature for the colliders O-2, N-2, H-2, Kr, and Xe. State-specific quenching cross sections are reported at 242 and 196 K. OH is formed over a large range of rotational levels by the photolysis of HNO3, and the time dependence of laser-induced fluorescence decays measures the quenching, Levels as high as N' = 13 were studied. The quenching cross sections always decrease with increases in both N' and temperature, However, the results are ambiguous regarding a question posed earlier: Does temperature play a role in defining the rotational state dependence of OH A(2)Sigma(+) quenching?