PHOTOIONIZATION OF SEVERAL MOLECULES
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Date
1954
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Ohio State University
Abstract
Ionization potentials were determined by examining the long wavelength limit of photoionization yield curves obtained by a method described previously. Values for $CS_{2}, H_{2}S, C_{6}H_{6}$, toluene, p-xylene, $C_{2}H_{4}$, butadiene, and $CH_{3}I$ agreed with spectroscopic values obtained by Price and coworkers. Ionization potentials of $NH_{3}$, NO, acetone, methyl-ethyl-ketone, $CH_{3}OH$, and $C_{2}H_{5}OH$ will also be reported. Improved energy measurements showed that the photoionization cross sections of NO in the region 1070A-1340A obtained earlier were about 40 percent too low. The photoionization cross section of $NH_{3}$ was found to rise gradually with decreasing wavelength in the region $1200A-1060A$ and to reach a value of $9\times 10^{-18}$ $cm^{2}$ at 1060A.
Description
Author Institution: Geophysics Research Directorate, Air Force Cambridge Research Center