E. H. Ahmed, P. Qi, B. Beser, J. Bai, R. W. Field, J. P. Huennekens, and A. M. Lyyra Phys. Rev. A: At. Mol. Opt. Phys., vol: 77, num: 5, 7 pages, published: 29 May 2008, 053414 Abstract: The^{ }absolute magnitude of the transition dipole moment function µ_{e}(R) of^{ }the A ^{1}−X ^{1} band system of Na_{2} was mapped experimentally over^{ }a relatively large range of internuclear distance R. The transition^{ }dipole moment matrix element of a set of rovibrational transitions^{ }between the A ^{1} and X ^{1} states was measured using the^{ }Autler-Townes effect. By employing the R-centroid approximation, or a fit^{ }to a polynomial function involving higher order R centroids, µ_{e}^{ }as a function of the internuclear distance was obtained. These^{ }Autler-Townes effect based measurements yield the absolute magnitude of µ_{e},^{ }which can be used to test ab initio theoretical transition^{ }dipole moment functions or to “normalize” experimental transition moment functions^{ }obtained from intensity measurements, which in general give only the^{ }relative behavior of µ_{e}(R). Atoms and molecules. Interaction of atoms and molecules with external fields and radiation. Transitions between electronic states. Lifetimes and transition probabilities for molecules. Link |
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