Symmetrized rovibrational local states for triply degenerate modes of spherical molecules: application to intensity calculations in the nu3 ladder

International audience; XY6 octahedral molecules, like SF6, WF6 and UF6, reveal a localized behaviour in the excited states of their stretching mode nu3. This character may be described through the G U (3) K3 O_h group chain (Boujut, V., Michelot, F., and Leroy, C., 1998, Molec. Phys., 93, 879). In this paper, we extend our previous theoretical developments by: the construction of a symmetrized local rovibrational basis, denoted |n;J_eta|K|Gamma mu>, well adapted to the study of the(n 00) states of the nu3 ladder the introduction of an approximate infrared intensity model for the transitions (000) (n 00) with n odd. We believe that the simplicity of the analytic expressions obtained in each…

Algebraic study of pyramidal XY3 molecules in vibrationally high excited states.

National audience

The U(p+1) Formalism Applied to The Vibrational Hamiltonians of Nonlinear AB2 Molecules

Algebraic Hamiltonian Adapted to Strech-Bend Coupling in the Stibine Molecule.

Rovibrational interactions in the local-mode limit. The (n000) stretching overtone bands of spherical tops.

Fermi-type interaction in molecular and atomic Hamiltonians. Application to molecular systems and Bose-Einstein condensates.

International audience; We present a simple prescription to build phenomenological Hamiltonians describing Fermi-type interactions and apply the developed formalism to two distinct physical systems. First, in a very simple way, we derive equations describing time dynamics of two coherently coupled Bose-Einstein condensates. Further, for bent XY2 molecules, we reproduce all the experimental data with an excellent precision.

Approche Unitaire en Spectroscopie Moléculaire

International audience

The U(p+1) Formalism Applied to The Vibrational Hamiltonians of Nonlinear ABC Molecules