Photoionization Spectra of Solutions as Obtained by Photoelectron Spectroscopy.
NEW YORK UNIV N Y DEPT OF CHEMISTRY
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Photoelectron spectroscopic methods with variable photon energy about 5.2 to 10 eV are applied to solutions of various photoionizable substances. A recently developed photoelectron spectrometer with continuous renewal of solution is briefly described. Experimental data include the quantum yield per incident photon for photoelectron emission as a function of photon energy energy distribution curves EDC of emitted electrons at given photon energies over the full photon energy range. Photoionization cross sections are obtained by the method of EDC superposition as a function of photon energy. The photoionization spectra thus obtained are discussed, and mechanisms of photoionization are established direct bound-continuum transitions and autoionization of bound excited states. The following systems are examined lithium ferrocyanide in glycol, lithium iodide in tetraglyme, ferrocene in tetraglyme, beta-naphthol in glycol. The transfer of kinetic energy from quasifree electrons generated by optical excitation in the liquid phase to the liquid medium is briefly treated.
- Radiation and Nuclear Chemistry