* E. AHMED*, B. BESER, P. QI, S. KOTOCHIGOVA, Physics Department, Temple University, Philadelphia, PA 19122; J. HUENNEKENS, Physics Department, Lehigh University, Bethlehem, PA 18015; A. M. LYYRA, Physics Department, Temple University, Philadelphia, PA 19122.

The absolute value of the transition dipole moment function µ_{e}(R) of the A^{1}
^{+}_{u}-X^{1}
^{+}_{g} band of Na_{2} was mapped experimentally within a relatively large range of internuclear distance R. The transition dipole moment matrix element of a set of rovibrational transitions between the A^{1}
^{+}_{u} and X^{1}
^{+}_{g} states was measured using the Autler-Townes (AT) effect. By employing the R-centroid approximation, or a fit with a polynomial function involving the higher R-moments, µ_{e} as function of the internuclear distance was constructed. The AT effect based measurements give the absolute value of µ_{e} which can be used to "normalize" the transition dipole moment functions µ_{e}(R) obtained with other experimental techniques, such as line intensity based measurements, which in general give only the relative behavior of µ_{e}(R).