Zeeman Tuning Rates for Q-Branch Transitions in the nu3 Band of NO2
Zeeman tuning rates have been measured for Q-branch transitions in the nu3 band of NO2 ( approximately 1610 cm-1) for magnetic fields of up to 564 Gauss. The average measured tuning rate is 0.1815(53) x 10(-3) cm-1/Gauss with no dependence on Ka within the approximately 3% standard deviation. Despite significant spin-rotation interaction between several of the observed levels the result agrees with the simple linear model for Hunds case (b) molecules (tuning rate = 2µogs = 0.18696 x 10(-3) cm-1/G), which neglects the spin-rotation interaction between different J states. The Zeeman effect is analyzed in a full treatment of the Hamiltonian, including spin-rotation interaction, in order to account for the agreement with 2µogs and to explore the onset of spin-rotation effects in the spectra as the magnetic field is increased. Copyright 1998 Academic Press.
Mahon
CR
Ames Research Center, NASA, Moffett Field, California, 94035-1000
Chackerian
C