Electron-impact excitation of X (1)Sigma(+)(g)(v ''=0) to the a '' (1)Sigma(+)(g), b (1)Pi(u), c(3) (1)Pi(u), o(3) (1)Pi(u), b ' (1)Sigma(+)(u), c(4)' (1)Sigma(+)(u), G (3)Pi(u), and F (3)Pi(u) states of molecular nitrogen

摘要

Measurements of differential cross sections (DCSs) for electron-impact excitation of the a('') (1)Sigma(+)(g), b (1)Pi(u), c(3) (1)Pi(u), o(3) (1)Pi(u), b' (1)Sigma(+)(u), c(4)' (1)Sigma(+)(u), G (3)Pi(u), and F (3)Pi(u) states in N-2 from the X (1)Sigma(+)(g)(v ''=0) ground level are presented. The DCSs were obtained from energy-loss spectra in the region of 12 to 13.82 eV measured at incident energies of 17.5, 20, 30, 50, and 100 eV and for scattering angles ranging from 2 degrees to 130 degrees. The analysis of the spectra follows a different algorithm from that employed in a previous study of N-2 for the valence states [Khakoo Phys. Rev. A 71, 062703 (2005)], since the (1)Pi(u) and (1)Sigma(+)(u) states form strongly interacting Rydberg-valence series. The results are compared with existing data.