Electron-impact excitation cross sections for the bΣu+3state ofH2

Differential and integral cross sections for electron-impact excitation of the b ${\mathrm{}}^3$ ${\Sigma }_u^{+}$ state of ${\mathrm{H}}_2$ have been determined in the 20–100-eV impact energy region. The calibration of the cross sections was achieved through the ${\mathrm{H}}_2$ elastic scattering cross sections, which in turn were normalized to absolute He elastic scattering cross sections. Comparison is made with available experimental data and with theoretical results applying Born-Ochkur-Rudge, distorted-wave, and close-coupling approximations.