Electric-Field-Induced Spectra of Hydrogen Cyanide

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Abstract
Electric‐field‐induced spectra (efs) of several absorption bands of HCN were experimentally produced and shown to exhibit the following phenomena: each of the three limiting case efs line shapes predicted by N. J. Bridge, D. A. Haner, and D. A. Dows [J. Chem. Phys. 48, 4196 (1968)], viz., normal, first derivative, and second derivative; two distinct types of induced transitions which are forbidden in the zero‐field case; and l‐type doubling enhancement of electric field effects. Although experimental conditions were such as to render the validity of a weak field approximation doubtful, line shapes as well as transition frequencies were found to agree with predictions based upon that assumption.

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