Radiative Collisions between Molecular and Electron Beams

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  • Radiative Collisions between Molecular and Electron Beams II. Angular Momentum Distribution of OH<sup>*</sup>Radicals Splitting from H<sub>2</sub>O<sub>2</sub>Molecules
  • II. Angular Momentum Distribution of OH<SUP>*</SUP> Radicals Splitting from H<SUB>2</SUB>O<SUB>2</SUB> Molecules

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A molecular spectroscopic study of the radiative collision of electrons with H2O2 molecules leads to a pronounced abnormal rotation of the OH* radical split by electron impact from H2O2. A homogeneous electron beam is fired at right angles across a localized jet of H2O2 vapor in a vacuum chamber maintained at a pressure of about 1×10−4 mmHg. The angular momentum distribution curve obtained shows a single maximum which is located near the rotational quantum number of 20, and the rotational temperature corresponds to 20,100°K, being remarkably higher than the initial gas temperature. In comparison with the double maxima found for H2O, there are two differences, namely—the absence of the first maximum and the shift of the second maximum towards higher rotational quantum numbers.

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