Regularity of the vibrational spectrum of the CS[sub 2] in the Σ[sub g][sup +] state: Our previous results revisited

L. Michaille (1) , U. Rasbach , J. P. Pique (1)

1 LIPhy - Laboratoire Interdisciplinaire de Physique [Saint Martin d’Hères]

In previous experiments, a nearly complete vibrational spectrum of the CS2 molecule in the Σg+ state has been obtained using a laser induced fluorescence method. The statistical tests of the random matrix theory, applied on this spectrum, suggest a transition to quantum chaos. The aim of this letter is to show that these statistical results are biased because of a nonsingle excitation of the molecule. This is experimentally confirmed by high-resolution new experiments in supersonic jet, using the powerful laser chain of the french project for the isotopic separation of uranium by laser (SILVA project).

Domaines: Optique [physics.optics]; Physique [physics]

L. Michaille, U. Rasbach, J. P. Pique. Regularity of the vibrational spectrum of the CS[sub 2] in the Σ[sub g][sup +] state: Our previous results revisited. Journal of Chemical Physics, 1999, 111 (7), pp.2968-2972. ⟨10.1063/1.479578⟩. ⟨hal-01118299⟩