Ion Energy-Loss Spectroscopy for the Collisions of Kr⁺(²P_J) with N₂, CO, NO, and O₂

Abstract

Ion energy-loss spectra for 1308 eV Kr⁺(²P_J) incident on N₂, CO, NO and O₂ were measured. For all molecules, fine-structure transitions between different J states of the projectile and vibrational excitations of the molecules were observed. In the case of N₂ and NO, the spectra were relatively simple and only the excitations of fundamental vibrations were found. For CO and O₂, the excitations of the harmonics, v=0→2, were also observed. In addition to these, for CO, the peak due to the process, Kr⁺(²P_1⁄2)+CO(¹Σ, v=0)→Kr⁺(²P_3⁄2)+CO(¹Σ, v′=1), was found. For O₂, the peak due to the electronic excitation in the target, ³Σ→¹Δ, was observed as well as the prominent peak corresponding to the process, Kr⁺(²P_1⁄2)+O₂(³Σ, v=0)→Kr⁺(²P_3⁄2)+O₂(¹Δ, v′=0).