H+O3 Fourier-Transform Infrared Emission and Laser Absorption Studies of OH(X 2Pi) Radical: An Experimental Dipole Moment Function and State-to-State Einstein A Coefficients

摘要

The relative intensities of 88 pairs of rovibrational transitions of OHdistributed over 16 vibrational bands have been measured using Fourier transform infrared (FTIR) emission/absorption spectroscopy. Each pair of transitions originates from a common vibrational, rotational, and spin-orbit state, so that the measured relative intensities are independent of the Oh number density and quantum state distribution. These data are combined with previous relative intensity absorption measurements and v=0,1, and 2 permanent dipole moments to determine the OH dipole moment function as a cubic polynomial expanded about re, the equilibrium bond length. The relative intensities provide detailed information about the shape of the Oh dipole moment function and hence the absolute Einstein A coefficients.