The theoretical estimation of the G-values for the ionization and excitation of thirty-eight gaseous compounds irradiated by 100 keV electrons.

概要

論文の詳細を見る
The G-values for the ionization and excitation of thirty-eight gaseous compounds irradiated by 100 keV electrons have been calculated by combining the binary-encounter-collision theory with the theory of the degradation spectrum, which is based on the continuous-slowing-down approximation (CSDA). The thirty-eight compounds include C2–C6 alkanes, cycloalkanes, C2–C4 olefins, acetylene, 1,3-butadiene, benzene, toluene, phenol, pyrrole, furan, several alcohols, ethers, ketones, acetaldehyde, carbon dioxide, and hydrogen cyanide. Most of the calculated G-values of the electrons were in fair agreement with the experimental values. In the cases of several hydrocarbons, the dissociation from the superexcited state into the neutral fragments was taken into account, since the data for the fragmentation ratios were available. In the case of acetylene, the discrepancy in the G-values of electrons obtained experimentally and theoretically suggests that excited acetylene gives rise to a chemiionization reaction. In order to check the CSDA, the Fowler equation for helium has been calculated and the results compared with those obtained under the CSDA. The discrepancy in the G-values obtained by the two methods did not exceed 7%.
公益社団法人日本化学会の論文