LIF intensity distribution as a deperturbation tool: application to the fully-mixed A1Σ+-b3Πcomplex of NaRb

The intensity distribution in the NaRb A1Σ+(vA′=16,J′=30;vA′=18,J′=66)∼b3Π→X1Σ+(vX′′=2÷44,J′′=J′±1) fluorescence series induced by diode laser excitation from the ground state have been measured and directly applied to restore adiabatic potential energy curve for the A-state of the fully-mixed A1Σ+-b3Π complex. Relative intensities in the long non-diagonal A→X progressions have been proved to be much less influenced by strong spin-orbit interaction than the corresponding term values of the fully coupled A1Σ+-b3Π complex.