On the 3${}^1{\Pi }_u$ state in caesium dimer

Abstract

Polarisation labelling spectroscopy technique was employed to study the 3${}^1{\Pi }_u$ state of Cs${}_2$ molecule. The main equlibrium constants are $T_e=20684.60$cm${}^{-1}$, ${\omega }_e=30.61$cm${}^{-1}$ and $R_e=5.27$Å. Vibrational levels $v=4-35$ of the 3${}^1{\Pi }_u$ state were found to be subject to strong perturbations by the neighbouring electronic states. Energies of 3094 rovibronic levels of the perturbed complex were determined.

9 pages, 3 figures, link to Supplementary data