Ion Energy-Loss Spectroscopy of Kr²⁺–He and –Ne Collisions. II One Electron Capture Processes

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One electron capture processes in the collision of Kr²⁺(³P_2,1,0, ¹D₂, ¹S₀) with He and Ne are studied in the energy range from 0.5 to 1.3 keV with a high resolution ion energy-loss spectrometer. Possible reaction channels for each collision system were determined from the measured kinetic energies of the product Kr⁺. In the case of Kr²⁺+He system, the reaction from Kr²⁺(¹S₀) state to Kr⁺(²P_J) state is a dominant process, whereas the reaction starting from Kr²⁺(¹D₂) state plays an important role in Kr²⁺+Ne system. The cross sections of each reaction channel in Kr²⁺+ Ne system are compared with each other. The cross sections, plotted against the crossing radius R_c of the potential energy curves estimated from the exothermicity, are peaked over a relatively narrow range of R_c from 2 Å to 6 Å and having a maximum at R_c=3 Å. It should be noted that this “reaction window” is composed of the data obtained for single collision system.