AN EXPERIMENTAL INVESTIGATION OF THE NF RYDBERG STATES OF CARBON-DISULFIDE

The ((2) Pi(g3/2,1/2))nf Rydberg states of CS2 are investigated hy mea ns of (3 + 1) resonance enhanced multiphoton ionization (REMPI) time-o f-flight (TOF) spectroscopy. The excitation spectrum of jet-cooled car bon disulfide has been obtained in the 74 000-81 000 cm(-1) energy reg ion. From the CS2+ mass selected REMPI spectra, the nf Rydberg series have been clearly identified and they have been found converging to th e two spin-orbit components of the CS2+ (X (2) Pi(g)) ground state cor responding to the n=4-11 members. Comparison of the CS2+, CS+, S+ mass selected REMPI spectra gave a better insight of the competition betwe en dissociation and ionization processes. The use of linearly nad circ ularly polarized laser light, selection rules and quantum defect consi derations have led to a preliminary analysis of the measured nf comple xes. (C) 1997 American Institute of Physics.