THE IONIZATION OF WATER, METHYLAMINE, AND METHYL ALCOHOL, USING ELECTRON AND ION IMPACT
ROYAL INST OF TECH STOCKHOLM (SWEDEN) DEPT OF PHYSICS
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The ionization of H2O was investigated, using charge exchange in a double mass spectrometer. The breakdown graph was constructed. A break in the electron impact ionization efficiency curve is explained as being due to preionization, as its explanation as being due to an ion-molecule reaction between H ions and H2O seems to be less probable. The appearance potential of OH was found to be considerably higher with charge exchange than when electron impact was used, which agrees with an earlier finding that intercombination transitions seem to be more strictly forbidden in charge exchange than in electron impact. CH3NH2 and CH3OH were investigated, using charge exchange at elevated pressures. The breaks in the ionization efficiency curves for these molecules are discussed and ascribed to preionization or secondary processes.
- Atomic and Molecular Physics and Spectroscopy