PHOTODETACHMENT OF $OH^{-}$: EFFECTS OF A DIPOLE ON ROTATIONAL THRESHOLDS
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Date
1978
Journal Title
Journal ISSN
Volume Title
Publisher
Ohio State University
Abstract
The relative cross section for the photodetachment of $OH^{-}$ has been measured in the threshold region between $14 300\;cm^{-1}$ and $14 700\;cm^{-1}$ with a resolution of $1.0\;cm^{-1}$, A mass analysed, near thermal $(\sim 700^{\circ}\, K)$ beam of $OH^{-}$ formed in a drift ion source was crossed with the intracavity beam of an argon ion laser pumped tunable dye laser. Individual thresholds corresponding to rotational channel openings have been resolved in selected regions of the P, Q and R branches. The data provide the first direct gas phase determination of a negative ion rotational constant as well as information on the influence of a rotating molecule with a permanent dipole moment on the threshold photodetachment process.
Description
This work was supported by the National Science Foundation through Grants PHY76-04761 and CHE75-01565.
Author Institution: Department of Chemistry, University of Colorado, Joint Institute for Laboratory Astrophysics, and National Bureau of Standards
Author Institution: Department of Chemistry, University of Colorado, Joint Institute for Laboratory Astrophysics, and National Bureau of Standards