State selected ionndash;molecule reactions by a TESICO technique. IV. Relative importance of the two spinhyphen;orbit states of Ar+in the charge transfer reactions with N2and CO

摘要

Charge transfer reactions Ar+(2PJ)+N2rarr;N+2+Ar (1) and Ar+(2PJ)+COrarr;CO++Ar (2) have been studied for the two spinhyphen;orbit states (J= 3/2 and 1/2) separately using the threshold electronhyphen;secondary ion coincidence (TESICO) technique. Relative cross sections for the two states sgr;(3/2) and sgr;(1/2) have been determined at three collision energies 0.2, 1.4, and 5.8 eV. It has been found that in Reaction (1), sgr;(3/2) is larger than sgr; (1/2) with ratio sgr;(1/2)/sgr;(3/2) ranging from 0.5 to 0.8 depending on the collision energy, whereas in Reaction (2), sgr;(1/2) is larger than sgr;(3/2) with the ratio ranging from 1.2 to 1.6. The implications of these results are discussed with regard to the roles of energy resonance and Franckndash;Condon factors in charge transfer processes.