摘要

With pulsed optical-optical double resonance (OODR) fluorescence excitation spectroscopy Rydberg states of Li-7(2) in the energy region of 35 500-38 000 cm(-1) were studied and 146 transitions into the 3 (1) Pi(8) state of Li-7(2) were measured. They were assigned to 10 vibrational levels of the 3 (1) Pi(g), state. A new set of Dunham constants, RKR potential curve, and Franck-Condon factors for the transitions form the A (1) Sigma(u)(+) state are derived. The perturbations between the 4(F) (1) Sigma(g)(+) , 5 (1) Sigma(g)(+), 6 (1) Sigma(g)(+), 2(G) (1) Pi(g) Rydberg states with the 3 (1) Pi(g) state are discussed. The A-doubling splitting of the observed levels can be ignored with our accuracy (0.2 cm(-1)).