FAR-INFRARED LASER STARK SPECTROSCOPY OF $PH_{3}$
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Date
1996
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Ohio State University
Abstract
The Stark spectrum of $PH_{3}$ has been investigated in the far-infrared region using the DCN laser. Several families of absorption lines were observed in both parallel and perpendicular polarizations using electric fields up to 57 000$\frac{V}{cm}$. The multiplet transitions, independently observed with two different DCN laser lines, were assigned as $J_{k} = 6_{k} \leftarrow 5_{k} E, K = 1, 2, 4$, and 5 along with $J_{k} = 6_{3}\leftarrow 5_{3} A_{1,2}, \leftarrow A_{1,2}$, in the $\nu_{2} = 1$ vibrational state. In addition, several absorption lines belonging to the forbidden zero-field transitions $J_{k} = 6_{3} \leftarrow 5_{3} A_{1,2}, \leftarrow A_{1,2}$, have been observed for the first time. Accurate zero-field frequencies for all assigned transitions will be presented.
Description
Author Institution: Department of Physics, New Mexico State University; Department of Physics, University of Wisconsin