Abstract
There are three channels of excitation in collisions between Ar2+ and Ne or He, the first is double-electron capture into excited states, the second is single-electron capture into excited states and the third is direct excitation of target by the impact of incident ion. The emission cross sections of ArI, ArII, NeI, NeII, HeI and HeII lines have been obtained and compared. The emission cross sections of Ar2+ +Ne collision system is much larger than that of Ar2+ +He collision system.
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