Laser-induced fluorescence of Rb2: The (1)1Σ+g(X), (2)1Σ+g, (1)1Πu(B), (1)1Πg, and (2)1Πu(C) electronic states

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Abstract
More than 10 000 resolved rotational lines in the (2) 1Πu(C)–(1) 1Σ+g(X), (2) 1Πu(C)–(1) 1Πg, (2) 1Πu(C)–(2) 1Σ+g, (1) 1Πu(B)–(1) 1Σ+g(X), and (1) 1Σ+u(A)–(1) 1Σ+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 5×10−3 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 (v‘=112) leads to the value of the energy of dissociation: 3994.4±0.4 cm−1.