Radiative Collisions between Molecular and Electron Beams

II. Angular Momentum Distribution of OH^* Radicals Splitting from H₂O₂ Molecules

抄録

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.