Abstract
Using Infrared-Infrared Double Resonance (IIDR) high resolution spectroscopy, we have observed the 20200–21600cm−1 energy range of the 41Σg+ electronic state of Rb2. The absolute vibrational quantum number assignment is based on the isotope effect using 824 rovibrational levels assigned to the 85Rb85Rb and 85Rb87Rb isotopomers. In addition to perturbations between the 41Σg+ and 31Σg+ state, strong couplings between the 41Σg+ and 23Πg states were observed. Preliminary molecular constants and an RKR potential energy curve are given.
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