Rotational Excitation of Diatomic Molecules by Electron Impact

摘要: Rotational excitation of homonuclear diatomic molecules can be simply yet accurately calculated from the scattering parameters elastic electron-molecule in fixed-nuclei approximation. The total cross sections for $\ensuremath{\Delta}j\ensuremath{\ne}0$ transitions are independent $s$-wave parameters, and ratios $\ensuremath{\Delta}j=\ifmmode\pm\else\textpm\fi{}2$ agree with experimental results ${\mathrm{H}}_{2}$ rotational close-coupling calculations. Absolute differential explained.