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

One electron capture processes in the collision of Kr 2+ ( 3 P 2 , 1 , 0 , 1 D 2 , 1 S 0 ) 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 Kr 2+ + He system, the reaction from Kr 2+ ( 1 S 0 ) state to Kr + ( 2 P J ) state is a dominant process, whereas the reaction starting from Kr 2+ ( 1 D 2 ) state plays an important role in Kr 2+ + Ne system. The cross sections of each reaction channel in Kr 2+ + 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.