A COMPARISON OF EMISSION CROSS SECTIONS IN COLLISION BETWEEN Ar^(+2) AND Ne OR He

There are three channels of excitation in collisions between Ar^(2+) 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 Ar^(2+) +Ne collision system is much larger than that of Ar^(2+) +He collision system.