N2+ (A 2Piu from X 2Sigmag+) excitation in the charge-exchange collision with caesium: two-electron effects at keV energies

摘要: Charge-exchange collisions of 5 keV N2+ on Cs are examined using translational spectroscopy to identify the internal energy states fast neutralized products. Optical pumping reactant, N2+(A from X) or Cs(2P 2S), is used change selectively electronic configurations and reaction defect, while monitoring resulting changes in product state distribution. The N2+/Cs charge exchange yields N2 Rydberg states. A simple model their formation would involve transfer single outer electron into a orbit built core. However, present studies surprising highly efficient mechanism which configuration reactant also changed during transfer. This facile two-electron process, occurs for both near-resonant non-resonant channels acid has not been observed other molecular charge-transfer reactions, believed be related very small separation between ground first excited N2+.