Hyperfine-Induced Ungerade-Gerade Symmetry Breaking in a Homonuclear Diatomic Molecule near a Dissociation Limit: ^{127}I_{2} at the ^{2}P_{3/2}-^{2}P_{1/2} Limit - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Physical Review Letters Année : 1984

Hyperfine-Induced Ungerade-Gerade Symmetry Breaking in a Homonuclear Diatomic Molecule near a Dissociation Limit: ^{127}I_{2} at the ^{2}P_{3/2}-^{2}P_{1/2} Limit

Résumé

A symmetry breaking of the ungerade-gerade character through hyperfine perturbation has been directly observed for the first time in a homonuclear diatomic molecule (127I2). An important consequence of this symmetry breaking is the mixing of ortho and para modifications. Evidenced by anomalies in the observed hfs of high-lying rovibrational levels in the B 0u+ state and extra lines, it is due to a hyperfine perturbation of this state by a 1g state sharing the same dissociation limit. Such a situation should be met in other molecules.
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hal-01118057 , version 1 (18-02-2015)

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J. P. Pique, F. Hartmann, R. Bacis, S. Churassy, J. Koffend. Hyperfine-Induced Ungerade-Gerade Symmetry Breaking in a Homonuclear Diatomic Molecule near a Dissociation Limit: ^{127}I_{2} at the ^{2}P_{3/2}-^{2}P_{1/2} Limit. Physical Review Letters, 1984, 52 (4), pp.267-270. ⟨10.1103/PhysRevLett.52.267⟩. ⟨hal-01118057⟩
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