High resolution Fourier spectroscopy and laser spectroscopy of Cs2: The 2 1Σ+<i>g</i>, (<i>C</i>) 2 1Π<i>u</i>, (<i>D</i>) 2 1Σ+<i>u</i>, 3 1Σ+<i>g</i>, and (<i>E</i>) 3 1Σ+<i>u</i> electronic states

Abstract

More than 8000 completely resolved rotational lines in the E 1Σ+u →X 1Σ+g, E 1Σ+g →(2)1Σ+g, E 1Σ+u →(1)1Πg, E 1Σ+u →(3)1Σ+g, D 1Σ+u →(2)1Σ+g, C 1Σu →X 1Σ+g, and D 1Σ+u →X 1Σ+g transitions of Cs2 have been accurately measured with the techniques of Fourier transform spectroscopy, Doppler-free polarization spectroscopy, and optical optical double resonance. The wave numbers of all these rotational lines were determined with an accuracy of 1 to 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 six different excited electronic states of the Cs2 molecule.