氢及其同位素分子的电子碰撞解离反应截面研究

在边界等离子体中氢及其同位素分子与电子碰撞可以发生解离反应。对于尚无反应截面的氢及其同位素分子电子碰撞激发到三重态然后发生解离反应，作者基于莫尔斯函数、弗兰克－康登原理，采用半经典的Gryzinski方法计算了这一反应截面。得到了解离反应截面的影响因素、反应截面随电子能量的变化情况以及分子的振动能级对反应截面的影响。通过比较表明到排斥态的激发然后发生解离反应的反应截面占据主导地位，比激发到其它三重态激发然后发生解离的反应截面要大一个量级。

Study on Cross Sections for the Electron Impact Dissociation of the Hydrogen and Its Isotopic Molecules

Electron impact-induced dissociation by hydrogen and its isotopic molecule will occur in edge plasma. The cross section data for the electron impact excitation of the triplet of the hydrogen and its isotopic molecules, which can not be available from the literature have been calculated on the basis of Morse potential function, Franck-Condon theory and semi-classical Gryzinski method. Influencing factors of dissociative cross section, change of cross section with electron energy as well as the dependence of the cross section by vibrational level of ground state are presented in the paper. Comparative analyses show that the electron impact excitated to repulsive state will play a dominant role in the process, the cross section of which is about one order of magnitude larger than others.