ELECTRONIC TRANSITION MOMENT AND ROTATIONAL TRANSITION PROBABILITIES IN CH .2. B-2-SIGMA(-)-X(2)PI SYSTEM

摘要

Vibrational transition probabilities of the B (2) Sigma(-)-X(2) Pi band system of the CH radical, for the bound levels v'=0 and 1, have been measured in an 8 Torr flame using laser-induced fluorescence. These new branching ratio measurements together with Rydberg-Klein-Rees wave functions furnish an empirical electronic transition moment for this system. A quadratic form compares very well with previous ab initio calculations. The model predicts significant variations in lifetime with rotational quantum number As a consequence, the Einstein emission and absorption coefficients are strongly dependent on rotational quantum number, and are needed for quantitative temperature and nonthermal population distribution determinations. (C) 1996 American Institute of Physics. [References: 32]