# DIPOLE MOMENTS IN THE OUT-OF-PLANE BENDING LEVELS OF $\tilde{A}^{1}A_{2}$ FORMALDEHYDE-$h_{2}$ AND -$d_{2}$

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 Title: DIPOLE MOMENTS IN THE OUT-OF-PLANE BENDING LEVELS OF $\tilde{A}^{1}A_{2}$ FORMALDEHYDE-$h_{2}$ AND -$d_{2}$ Creators: Zabludoff, A.; Vaccaro, P. H.; Carrera, Martin; Kinsey, J. L.; Field, R. W. Issue Date: 1984 Publisher: Ohio State University Abstract: Stark-Induced Quantum Beat Spectroscopy is used to measure dipole moments in the $\nu_{4}$ vibrational levels of the first excited singlet state in formaldehyde-$h_{2}$ and -$d_{2}$. The polarization of the incident laser pulse is perpendicular to the direction of a 0 to 5 kV/cm static electric field. Evolution of the coherent superposition produced between Stark-split M-sublevels of a selected $A^{1}A_{2}$ rotation-vibration level exhibits a quantum interference effect which is observable in the undispersed fluorescence. Analysis of these oscillations yields dipole moments with a precision in excess of 1 part per 1000. The results can be interpreted in terms of $S_{1}\sim S_{0}$ perturbations and vibronic coupling models. Description: Author Institution: Department of Chemistry, Massachusetts Institute of Technology; Department of Chemistry, University of Chicago URI: http://hdl.handle.net/1811/16611 Other Identifiers: 1984-FD-16