LASER-INDUCED FLUORESCENCE OF RB2 - THE (1)1-SIGMA-G+(X), (2)1-SIGMA-G+, (1)1-PI-U(B), (1)1-PI-G, AND (2)1-PI-U(C) ELECTRONIC STATES

More than 10 000 resolved rotational lines in the (2) 1-PI-(u) (C)-(1) 1-SIGMA-(g)+ (X), (2) 1-PI-(u) (C)-(1) 1-PI-(g), (2) 1-PI-(u) (C)-(2) 1-SIGMA-(g)+, (1) 1-PI-(u) (B)-(1) 1-SIGMA-(g)+ (X), and (1) 1-SIGMA-(u)+ (A)-(1) 1-SIGMA-(g)+ (X) transitions of Rb2 have been accurately measured with the technique of Fourier-transform spectroscopy. The wave numbers of all the rotational lines were determined with an accuracy better than 5 X 10(-3) cm(-1). A thorough and simultaneous analysis of all the measured data yields molecular constants, potential-energy curves, and dissociation energies for five different excited electronic states. The observation of highly excited vibrational levels in the fundamental state (upsilion" = 112) leads to the value of the energy of dissociation: 3994.4 +/- 0.4 cm-1.