Spectroscopy of the lowest bound states in thallium iodide

Abstract

The vibrational constants of the two lowest electronic states in TlI have been determined by absorption and fluorescence spectroscopy. The ground state can be characterised by omega "e=152 cm-1 and omega "ex"e=0.29 cm-1 and the excited state by omega 'e=28 cm-1, omega 'ex'e=0.04 cm-1 with an equilibrium internuclear distance of r'3=0.367 nm.